Lingo Error: 3D cloned object...

Hi Experts, Was wondering if you could help.............

I have created a 3d scene and cloned a character in from the cast, this character is able to navigate around the screen, however im attempting to make it so when it walks into the blocks they will be solid, i added a collision code to try but get a error on the pMouse lines, yet recieve the error:

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Script error: Object expected
pMouse.addmodifier(#collision)
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Does anyone know how to fix this so it relates to a model cloned in?



To clone the model i used:

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pMouse = pMember.cloneModelFromCastmember("mouse", "mouse", member("mouse"))
pMouse.transform.scale = vector(0.2,0.2,0.2)
pMouse.transform.rotation = vector(0,90,0)
pMouse.transform.position.y = -10
pMouse.transform.position.x = 80
pMouse.transform.position.z = 40
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then to detect collision i tried the following:

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-- add collision modifier to the "wall"
pMember.model("block").addmodifier(#collision)

-- set bounding geometry for collision detection to bounding box of model
pMember.model("block").collision.mode = #box

-- resolve collision for wall
pMember.model("block").collision.resolve = TRUE

-- i get the error on the following line

-- add collision modifier to the character
pMouse.addmodifier(#collision)

-- set bounding geometry for collision detection to bounding box of model
pMouse.collision.mode = #mesh

-- resolve collision for character
pMouse.collision.resolve = TRUE

end
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Thank You