Windows 2000 Advance Server Problem

Dear All.
I am facing a strange problem. yesterday i left my Server running.I think so due to electricty factor, my server restarted. today when i came to office, my server was showing 1st login screen. as i enterd my administrator password to that Domain Controller for login it shows “Loading yr personal settings” then autometically shows “saving yr settings” and then logoff. server services are running and all network is working well but cant get in that DC’s Desktop.
Its a stand alone server.

Anybody can help me in this problem?