Lifecam VX1000 wont send video in Windows Live Messenge

Hi, i have a Microsoft Lifecam VX1000 with the windows 7 drivers, and Windows Live Messenger 2009, i can view the webcam in audio video setup within WLM, and if i send vidoe, contacts can see the video, but WLM becomes completely unresponsive and i have to close it down in taskmanager. I've searched everywhere for the solution to this, but nobody else seems to have had the same problem. Incidentally, i have done completely clean reinstallations of WLM and the Lifecam with registry and everything, still no luck. Help please?

Have you tried a completely clean instal of Win7? To ensure some third party software installed along the way isnt somehow interferring?

Also what build of Win7 are you using? It's possible a more recent build (such as the final RTM) might resolve the issue

im using rc 7100, where can i get the rtm? and a complete clean installation is a bit overkill wouldnt you say when im fairly sure its corrupt messenger files, microsoft support team have merely told me to uninstall it 3 times, oh and once told me to disable QoS packet scheduling, obviously, no dice.

EDIT: urm the rtm comes out in 4 days from now according to msdn?