Thanks for reporting but it is already known....
Messenger Plus! Live Disappears after restart
But actually, it is the other way around: MSN Shell does not (properly) work with Messenger Plus!.
It is actually an old issue on their side because in the way MSN Shell hooks itself into Messenger. Eventhough this issue is very old and the peoples at MSN Shell have been contacted about it, they do nothing to fix it.
/ 
