First off i am new to 3d and am starting kurts dog tutorial.

Ok, as i go to use my right button on my mouse to add the pic to the layer, nothing happens, no box or anything. So i minimize maya(PLE i might add) to see if its the mouse, but it works everywhere else. So i go to right click on an object and no menu comes up either. Does anyone know how to fix it, or what happend. Because i have used the right click many times before.

Thanks