Local Profile problem

Using Windows XP Pro on desktop and Small Business Server 2003 on server.

When one of my people logs on to his own computer Windows opens at a
temporary profile instead of his own. If he logs on to another computer he
logs on with his own profile. As administrator can I just delete his profile
from his computer and then reset the profile from the server or do I need to
completely delete his profile from everything and start over? And does
anyone have any ideas as to why this started doing this?

Thanks for your help.