i would thy finding the place in your settings that
allows ports(if on yahoo it is port 5100 that needs to be
allowed) if it is a cheaper web cam that could also be
the problem i would try buying a labtec webcam in the 50
to 200 dollar range if you can.
any other questios email me i ll be
glad to help if i can (e-mail address removed) i am in school
for network adiminstration right now so i am petty good
with computers.