Can't understand why you're having problems, Michelle. The only thing I can suggest is try uninstalling Moz (with Add / Remove Programs), then re-install it. Maybe something didn't go quite right the first time?
Dave, believe it or not, Firebird is supposed to be the slimmed down version of Mozilla! I have tried it, and have to admit, I didn't like it all that much. It seems too unfinished (which it is), and didn't inspire confidence, like Mozilla does. Maybe I'll try it again, when they've put all the nuts and bolts on. The same goes for Thunderbird, the stand alone mail client companion to Firebird.