UV Mapping - unwrap is greyed out

Using Blender 2.71.

After setting up armatures for my model and assigning eash bone to specific faces and vertices I can’t see my texture for my model anymore and cannot even unwrap. The option is greyed out. I have unwrapped it before and was able to color this and another model. Now the uv map and texture doesn’t show. I followed this video for adding armatures if this has anything to do with it. https://www.youtube.com/watch?v=PPbSGUPj72w