I am getting this error message popping up frequently:

"Windows Live Messenger



You were signed out from here because you signed in to a version of
Messenger that doesn't let you sign in to more than one place. Click here
to sign in again."







Clicking on the box 'here' automatically signs me back in. I am not signed
in to another version of messenger, and don't know why this is recurring.
Any suggestions? I believe the program is the latest with all updates.
Running Windows XP

Thanks,

Niki