[nio8808]

hi u guys.
Whenever I sign in to mac and leave the computer alone for a while messenger will sign off automatically. it will say smth like (you have been signed out for some reason). ...
can anyone tell me why it is signing me off all the time?? sry im new to mac.. maybe its smth to do with the energy saving settings?? bt its actually not going into standby i think.. id appreciate ur help! Thanks!
J

UPDATE: Here is exactly what it says all the time: "The system is unavailable now so you have been logged out of MS Messenger." And thats it. I figured it could be a connection problem since I am using WiFi at home. Bt the connections supposed to be alright, im only 2 rooms next to the router... any ideas how I can ensure that the connection is alwas stable? thank you!