Live messenger webcam issue

Hi there

Not sure if this the best forum for this but wasnt sure where else to post it...

Im running live messenger 2009 (latest release) on XP and can send and recieve webcams fine with all but one person, also running live 2009 - they can send cam, then it pops up as "connecting" and after a long pause it fails. I saw this problem posted elsewhere from someone who had previously been able to connect with the person in question but there was no solution offerred...

I can recieve webcam from other people, and the contact im having issues with says they can send cam to other contacts with no problems, it just seem to be sending to me that causes the problem

Can anyone suggest a solution?

Cheers

J