Yo!
Hey ya, i had a similar problem, make sure if u have a modern version of windows, for example XP both versions that you make sure that windows messenger cant run in the background, to do this go on the start bar/all programs/click on windows messenger, then on windows messenger main screen go on Tools on the toolbar at the top and then on options and the when the options screen comes up; go on 'preferences' tab at the top, and then on general on that page, make sure that 'run this probram when windows starts' and 'allow to run in background' make sure they AREN'T ticked when u have done that, exit windows messenger fully, u could reset the computer, and then open up MSN Messenger, hopefully this solves your problem, though if not Messenger may sign out if Outlook Express ir Microsoft Outlook have a hotmail or msn account enables on it, so when you open up Outlook, it disconects from MSN Messenger and uses your account to sign in on there, the only way i can think of fixing this is by taking the MSN account off of there or not opening outlook while on messenger................Hope that helps u!!!!!!, L8rz dude