corrupt user profile

My windows XP user profile will not allow me to log in (after a time of working properly has passed). The admin profile works fine.

It is set not to expire. I have actually deleted it and then recreated it. After a couple of weeks it will not allow me to log in. If I go in as admin and force feed the password, it works. Is there a SAM file in XP that I must delete before the new profile is created?