I dit a little research and now it works.
First I unistall the driver for the motion eye camera.
Now I try to help you step by step (sorry if my English isn't that well)
->Sony Visual Communication Camera
After that the camera isn't available any longer.
Please close the whole Hardware-Manager to save your configurations and open it afterwards again.
->search for changed Hardware
-> The motion eye camera will be installed again ( you can see the Sony Visual Communication Camera again in the hardware-list)
now click on the camera with your right mouse on property
and update the now-used driver in this menue.
Now my problems with using the cam in a MSN Live-Chat are done..
Hope it'll help you....