First, dump temporary Internet files, or cache, depending on your browser. Clear all of your old cookies. Also clear Temp files in general. Make
sure your accepting cookies from this domain. Restart your browser and see what happens.
Just FYI - I have been working on this problem for many days and was finally told that there is a problem with MS Internet Explorer 6.0 that causes
computers to fail to accept cookies and not remember passwords, regardless of your settings.