Pants/Shirt changing script not working, no errors?

So. I'm making a locker, but when I try to change the character's Shirt/Pants, it won't do anything nor print any errors.

function onTouch(part) 
    local human = part.Parent:findFirstChild("Humanoid") 
    if human ~= nil then 
        local shirt = part.Parent:FindFirstChild("Shirt")
        local pants = part.Parent:FindFirstChild("Pants")
        local shirtID = 328958545
        local pantsID = 328960599
        if shirt == nil then
            local s = Instance.new("Shirt", part.Parent)
            s.Name = "Shirt"
        if pants == nil then
            local p = Instance.new("Pants", part.Parent)
            p.Name = "Pants"
        end
        pants.PantsTemplate = ("http://www.roblox.com/asset/?id="..pantsID)
        pants.ShirtTemplate = ("http://www.roblox.com/asset/?id="..shirtID)
        end
    end
end
script.Parent.Touched:connect(onTouch)

And no. The script is not disabled.

Hierarchy

>Model
>>Spawn
>>>Clothes --This Is The Script

Edit

local n=0 
local function dp() 
     if true then 
        n=n+1
        print(n) 
    end 
end

function onTouch(part) 
    local human = part.Parent:findFirstChild("Humanoid") 
    dp()
    if human ~= nil then 
        dp() --Counts to here (2)
        local shirt = part.Parent:FindFirstChild("Shirt")
        local pants = part.Parent:FindFirstChild("Pants")
        local shirtID = 328958545
        local pantsID = 328960599
        if shirt == nil then --Problems here
            local s = Instance.new("Shirt", part.Parent)
            s.Name = "Shirt"
            dp()
        if pants == nil then --Problems here
            local p = Instance.new("Pants", part.Parent)
            p.Name = "Pants"
            dp()
        end
        pants.PantsTemplate = ("rbxassetid://"..pantsID)
        dp()
        shirt.ShirtTemplate = ("rbxassetid://"..shirtID)
        dp()
        end
    end
end
script.Parent.Touched:connect(onTouch)