Solved :D first download "msvcr71.dll" and copy it to windows directory. http://files.snapfiles.com/localdl936/msvcr71.zip then download "Visual Basic 6.0 Run-Time Files" and install it. http://download.microsoft.com/download/vb60pro/install/6/win98me/en-us/vbrun60.exe at last reinstall outlook messenger.