I have problems with Gtalk, i dont have a opition to make Gtalk calls anymore.

When someone calls to me from Gtalk i do get the call, but when i answer, it just shuts down.

I can't get video calls work in Skype either, i have Skype in Ubuntu 10.4 and webcam does work in that laptop, but don't know how to make video call, or how to enable video in a call. I can enable it from n900 but it doesn's show in laptop.