Audio/Video Setup

Hi
Am running a new Sony laptop with a built in web cam. Webcam works OK with the supplied software, (ArcSoft WebCam Companion 2) but does not function with WLM, whether or not the cam has been disconnected after using the ArcSoft application

When I try to run Audio & Video Setup on WLM I get the following message: "We are unable to run Audio & Video Set Up"

The version of WLM that I am using is 2009 (build, 14.0.8064.206)

Would be grateful if anyone has any ideas


Thanks

Update

I uninstalled WLM and reinstalled it, this hasn't worked. I then thought that maybe I could use an older version of MSN, so downloaded 7.5, but got an error message saying that I couldn't connect as I was using an old version of MSN - however it DID let me run Audio/Video setup successfully. I have now uninstalled 7.5 and reinstalled WLM again, however I still get the same message when trying to run audio/video setup