Windows XP creates a new user profile on login

When a domain user e.g. Smith Jane logs in, her machine continues to create a new profile called username. ABC i.e. Smith Jane. ABC. I have tried to erase that profile named Smith Jane. ABC but new profile is created again after she logs in. The machine seems that it doesn't use the old profile.
I have tried to copy her documents, favorites and desktop to the new profile and delete the old one and then new profile is changed to her username. This solution does not work either.
Could anyone help to solve this? Thanks a lot.
