Live Messenger

Hello,
can someone please help me ?!?!?!?
my msn is messing up i dont know what the hell is wrong with it !
If i sign in on any status that is online ie available, away or busy i sign in and it stays connected for about 1 minute then it signs me out again !!
but if i sign in as appear offline it connects and stays connected, then if i try to change my status (while appearing offline) the same problem happens my status will change to either available, busy or away for about 1 minute if even that ! then it will sign me out again.
I can chat while appearing offline, so theres nothing wrong with that part but its really annoying i want a status !!
Thanks in advance for anyones help.