Windows 7: Windows Live Messenger constantly disconnecting

Hi guys. I am pretty annoyed by this problem. My Windows Live Messenger keeps signing out every minute or so. However I suspect its because when someone in a group types to me or that group windows opens up. I left the group. But I tried talking to someone who was in the group the problem came back again.

Tried reinstalling messenger a few times but hasn't worked. Anyone can help me with this?