Model collision?

Recently i made a model of a stone wall, since all the warcraft wall models are pretty lame. However when i use my wall model in the game its like it has no collision. What i meen is that u can walk right through the thing. No boundrys. Any help here on how to make it solid so u cant walk through it?

that depends of World Editor ask this question in a war3 mapping forum, anyway i know of something cal collision shapes but, i have no idea of what they do, try reading art tools documentation or the 1rst option, k man.

give it a pathing object that corresponds to the models shape.

Also, make sure it's not set to 'walkable' in the object editor, or units will be able to walk over it.

ya hes right

Thanks guys for suggestions, however i figured out my real problem. Was that i forgot to rotate my model in max so it was cross sectioned wrong letting units run through it.