Why can't I use Yahoo Messenger? Every time I open it , it just signs in then it closes and logs out.
1.) Your prog may not be properly installed. - Re download and install it. 2.) Some fire wall is blocking the prog. - Check 3.) Is Your computer virus free.
You need to check if you're already logged in in another location, usually through browser. If you're logged in in your browser and you are trying to connect through the desktop application, you will encounter errors like the one you've described.