if you have it, try loading BBs envirosphere and put an image on it and then render the glass again. You can turn off "Visible in Camera" if you don't want to see it in the background, but it will still reflect onto the glass. A screenie of the material room wouldn't hurt either ;). I'm assuming you're talking Firefly. If Superfly, I can't help you but maybe someone else can. :)

Laurie