Weapon animation problem

OK, wierd one here. I've successfully made all sorts of new weapons and weapons animations be4. But never gun weapons, always beam or missile. When i try to make a gun weapon animation, it always comes out with 0 height, meaning it's squashed into 2 dimensions. The model is 3D, just like a missle model would be. The directx .x conversion is fine, still looks fine in the DX viewer. Except in the game, squashed into 2D. it's very frustrating... Any ideas?