Why do the rockets from this rocket launcher not work properly?

Hi, I'm a novice scripter, and the rocket launchers in my game aren't working properly. They used to, but...

Anyway, I tried making the projectile "canCollide", but then the rockets just bounced off objects.

Obviously, I used Roblox's rocket.

Here's the first script, called "Launcher" from the rocket.

local GRAVITY_ACCELERATION = 196.2

local RELOAD_TIME = 3 -- Seconds until tool can be used again
local ROCKET_SPEED = 50 -- Speed of the projectile

local MISSILE_MESH_ID = 'http://www.roblox.com/asset/?id=2251534'
local MISSILE_MESH_SCALE = Vector3.new(0.35, 0.35, 0.25)
local ROCKET_PART_SIZE = Vector3.new(1.2, 1.2, 3.27)

-----------------
--| Variables |--
-----------------

local DebrisService = Game:GetService('Debris')
local PlayersService = Game:GetService('Players')

local MyPlayer = PlayersService.LocalPlayer

local Tool = script.Parent
local ToolHandle = Tool.Handle

local RocketScript = script:WaitForChild('Rocket')
local SwooshSound = script:WaitForChild('Swoosh')
local BoomSound = script:WaitForChild('Boom')

--NOTE: We create the rocket once and then clone it when the player fires
local Rocket = Instance.new('Part') do
    -- Set up the rocket part
    Rocket.Name = 'Rocket'
    Rocket.FormFactor = Enum.FormFactor.Custom --NOTE: This must be done before changing Size
    Rocket.Size = ROCKET_PART_SIZE
    Rocket.CanCollide = true

    -- Add the mesh
    local mesh = Instance.new('SpecialMesh', Rocket)
    mesh.MeshId = MISSILE_MESH_ID
    mesh.Scale = MISSILE_MESH_SCALE

    -- Add fire
    local fire = Instance.new('Fire', Rocket)
    fire.Heat = 5
    fire.Size = 2

    -- Add a force to counteract gravity
    local bodyForce = Instance.new('BodyForce', Rocket)
    bodyForce.Name = 'Antigravity'
    bodyForce.force = Vector3.new(0, Rocket:GetMass() * GRAVITY_ACCELERATION, 0)

    -- Clone the sounds and set Boom to PlayOnRemove
    local swooshSoundClone = SwooshSound:Clone()
    swooshSoundClone.Parent = Rocket
    local boomSoundClone = BoomSound:Clone()
    boomSoundClone.PlayOnRemove = true
    boomSoundClone.Parent = Rocket

    -- Attach creator tags to the rocket early on
    local creatorTag = Instance.new('ObjectValue', Rocket)
    creatorTag.Value = MyPlayer
    creatorTag.Name = 'creator' --NOTE: Must be called 'creator' for website stats
    local iconTag = Instance.new('StringValue', creatorTag)
    iconTag.Value = Tool.TextureId
    iconTag.Name = 'icon'

    -- Finally, clone the rocket script and enable it
    local rocketScriptClone = RocketScript:Clone()
    rocketScriptClone.Parent = Rocket
    rocketScriptClone.Disabled = false
end

-----------------
--| Functions |--
-----------------

local function OnActivated()
    local myModel = MyPlayer.Character
    if Tool.Enabled and myModel and myModel:FindFirstChild('Humanoid') and myModel.Humanoid.Health > 0 then
        Tool.Enabled = false

        -- Create a clone of Rocket and set its color
        local rocketClone = Rocket:Clone()
        DebrisService:AddItem(rocketClone, 30)
        rocketClone.BrickColor = MyPlayer.TeamColor

        -- Position the rocket clone and launch!
        local spawnPosition = (ToolHandle.CFrame * CFrame.new(2, 0, 0)).p
        rocketClone.CFrame = CFrame.new(spawnPosition, myModel.Humanoid.TargetPoint) --NOTE: This must be done before assigning Parent
        rocketClone.Velocity = rocketClone.CFrame.lookVector * ROCKET_SPEED --NOTE: This should be done before assigning Parent
        rocketClone.Parent = Workspace

        wait(RELOAD_TIME)

        Tool.Enabled = true
    end
end

--------------------
--| Script Logic |--
--------------------

Tool.Activated:connect(OnActivated)

Here's the second script, called "Rocket."

local BLAST_RADIUS = 8 -- Blast radius of the explosion
local BLAST_DAMAGE = 100 -- Amount of damage done to players
local BLAST_FORCE = 1000 -- Amount of force applied to parts

local IGNORE_LIST = {rocket = 1, handle = 1, effect = 1, water = 1} -- Rocket will fly through things named these
--NOTE: Keys must be lowercase, values must evaluate to true

-----------------
--| Variables |--
-----------------

local DebrisService = Game:GetService('Debris')
local PlayersService = Game:GetService('Players')

local Rocket = script.Parent

local CreatorTag = Rocket:WaitForChild('creator')
local SwooshSound = Rocket:WaitForChild('Swoosh')

-----------------
--| Functions |--
-----------------

-- Removes any old creator tags and applies a new one to the target
local function ApplyTags(target)
    while target:FindFirstChild('creator') do
        target.creator:Destroy()
    end

    local creatorTagClone = CreatorTag:Clone()
    DebrisService:AddItem(creatorTagClone, 1.5)
    creatorTagClone.Parent = target
end

-- Returns the ancestor that contains a Humanoid, if it exists
local function FindCharacterAncestor(subject)
    if subject and subject ~= Workspace then
        local humanoid = subject:FindFirstChild('Humanoid')
        if humanoid then
            return subject, humanoid
        else
            return FindCharacterAncestor(subject.Parent)
        end
    end
    return nil
end

-- Customized explosive effect that doesn't affect teammates and only breaks joints on dead parts
local function OnExplosionHit(hitPart, hitDistance, blastCenter)
    if hitPart and hitDistance then
        local character, humanoid = FindCharacterAncestor(hitPart.Parent)

        if character then
            local myPlayer = CreatorTag.Value
            if myPlayer and not myPlayer.Neutral then -- Ignore friendlies caught in the blast
                local player = PlayersService:GetPlayerFromCharacter(character)
                if player and player ~= myPlayer and player.TeamColor == Rocket.BrickColor then
                    return
                end
            end
        end

        if humanoid and humanoid.Health > 0 then -- Humanoids are tagged and damaged
            if hitPart.Name == 'Torso' then
                ApplyTags(humanoid)
                humanoid:TakeDamage(BLAST_DAMAGE)
            end
        else -- Loose parts and dead parts are blasted
            if hitPart.Name ~= 'Handle' then
                hitPart:BreakJoints()
                local blastForce = Instance.new('BodyForce', hitPart) --NOTE: We will multiply by mass so bigger parts get blasted more
                blastForce.force = (hitPart.Position - blastCenter).unit * BLAST_FORCE * hitPart:GetMass()
                DebrisService:AddItem(blastForce, 0.1)
            end
        end
    end
end

local function OnTouched(otherPart)
    if Rocket and otherPart then
        -- Fly through anything in the ignore list
        if IGNORE_LIST[string.lower(otherPart.Name)] then
            return
        end

        local myPlayer = CreatorTag.Value
        if myPlayer then
            -- Fly through the creator
            if myPlayer.Character and myPlayer.Character:IsAncestorOf(otherPart) then
                return
            end

             -- Fly through friendlies
            if not myPlayer.Neutral then
                local character = FindCharacterAncestor(otherPart.Parent)
                local player = PlayersService:GetPlayerFromCharacter(character)
                if player and player ~= myPlayer and player.TeamColor == Rocket.BrickColor then
                    return
                end
            end
        end

        -- Fly through terrain water
        if otherPart == Workspace.Terrain then
            --NOTE: If the rocket is large, then the simplifications made here will cause it to fly through terrain in some cases
            local frontOfRocket = Rocket.Position + (Rocket.CFrame.lookVector * (Rocket.Size.Z / 2))
            local cellLocation = Workspace.Terrain:WorldToCellPreferSolid(frontOfRocket)
            local cellMaterial = Workspace.Terrain:GetCell(cellLocation.X, cellLocation.Y, cellLocation.Z)
            if cellMaterial == Enum.CellMaterial.Water or cellMaterial == Enum.CellMaterial.Empty then
                return
            end
        end

        -- Create the explosion
        local explosion = Instance.new('Explosion')
        explosion.BlastPressure = 0 -- Completely safe explosion
        explosion.BlastRadius = BLAST_RADIUS
        explosion.ExplosionType = Enum.ExplosionType.NoCraters
        explosion.Position = Rocket.Position
        explosion.Parent = Workspace

        -- Connect custom logic for the explosion
        explosion.Hit:connect(function(hitPart, hitDistance) OnExplosionHit(hitPart, hitDistance, explosion.Position) end)

        -- Move this script and the creator tag (so our custom logic can execute), then destroy the rocket
        script.Parent = explosion
        CreatorTag.Parent = script
        Rocket:Destroy()
    end
end

--------------------
--| Script Logic |--
--------------------

SwooshSound:Play()

Rocket.Touched:connect(OnTouched)