My webcam can be started remotely in msn!

Hi can someone help me on this, I have a logitech pro 5000 web cam which i use on msn, one of my contacts requested a video session with me when i wasnt in the room when i returned they told me that they had connected straight thru and seen an empty room and heard me moving about. Now when i had my last webcam i would get a box pop up saying suchansuch has requested a video .... etc ... Accept or Cancel. The box appears but it automatically accepts.

I assumed firstly it was a setting and alas cant find such a setting, my next thought was that its the driver so i updated the driver to the latest one but the problem still remains.

Anyone had or heard about this and know of any solutions? at the moment i am covering the cam with a cloth lol.