i have a problem that has bugging me for quite a long time now. when i start a video conversation with a certain person, my web cam freezes as soon that we make contanct (or some seconds after)!! even the other person's cam is not always visible. the audio is ok even though sometimes its not that clear. usually a grey box replaces were the person could be seen. please note that this happens with only one person!! we are both using messenger live, but im on windows xp and the other person has vista. i don't know if the problem is from my side or from the other half. can any one tell me how we can solve this problem.
anther problem that i have is that i am only able to see the cam in small size, the other sizes ara just switched off!!

thanks for any one who can help me

Looks like a bad/slow connection to me.

Do a speedtest & get your 'partner' to do one do and post the results here.

http://speedtest.net