FACEBOOK & WEBCAM! doesnt work!?

[Nemo]

okay so I have a pretty good webcam and it was working fine
until one day on facebook it wouldnt let me "find" the camera for some reason
I thought it was one day thing and facebook being messed up but it hasnt been working for
months and its bothering me. If i click on the webcam on my computer desktop it works fine and it works fine on skype but when im on facebook it wont let me directly use the webcam to post videos on ppl's wall and stuff.
PLEASE HELP ME! ITS REALLY IRRITATING!

[Anele]

what about when you use the Video Chat Rounds app on Facebook? http://apps.facebook.com/chatrounds/