Problem with Messenger 6.2 videoconference

Still awaiting a reply - anyone have any ideas

Hi,
Everything is working fine with my WinXP MSN-6.2 except
when in a videoconference i cannot send video - it just
gives me the ittle msn "snowman" picture and a red cross
throught a
webcam picture. I can send webcam fine when its just the
webcam but not in conference. I am not behind any
firewalls. What info must i provide for someone to be able
to help me - i havent been able to find anyone else in
forums with this problem.

Awaiting any help,
kind regards,
Andrew S