Texture mapping problem in Maya

[Mutant Funk Drink]

For some reason I end up getting these big black blocks in the texture when I try and add a texture map to the legs of the T rex that I'm modeling.

http://i42.tinypic.com/2rnbyur.jpg

I'm using Maya 2009. I modeled the body in the same way, but for some reason it turned out fine. Does anyone know what's causing this?