connectin gto Net messenger

I have been experiencing a constant failure to connect to
Net Messenger, I continue to get a pop up windows
messenger error message stating that I have failed to
conect to Net messager and then I am prompted to retry
where I am prompted to input my password after doing this
and indicate I wish the password to be remebered, It
allows me to get to windows messenger only to have the
same error message appear again abnd again. How can this
be fixed.