BodyVelocity for PrimaryPart not working?

I shorten the script so that it won't be too complicating.I had already made the variables so no worries.

The BodyVelocity thing is supposed to make the PrimaryPart of my model to move forward by itself.But it isn't working,what am I doing wrong?

Local script in StarterPack

    local BV = Instance.new('BodyVelocity')
    BV.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
    BV.Velocity = Character.Torso.CFrame.LookVector * 100
    BV.Parent = mic.PrimaryPart