msn 9 crash when using webcam

After instal msn 9, i started to have problems with my webcam.

with some persons it works just fine.
with others (even when they have msn 9) it just dont work, it stops connecting

when i try to connect with video conf, it just crash the msn.

I have the latest drive of the webcam (its a logitech)
I have disconected the anti virus firewall

note: i have a router, and windows xp sp 3. With msn 8, everithing worked fine

im having the same thing..
the connection on msn says i have problame with UPnP but i opened up all
ports.. tryin everying..

?! help