can't log in using forum name/password

When ever I try to log in using my forum name/password I get a little message at the top of my browser saying something about no zip code and then I am back to the login page.  I have to use my Verizon account name and password to get into the forums.  I tried to find where I could check to see if there is an issue with my forum profile but I can't seem to find that info.  I would appreciate some help with this issue.