Windows XP Login then Logoff!

Have the problem stated in the title. Damn frustating when you can't get into windows to do some fixing. Found a few web pages. Here are some of the tips.
But it doesn't work for me. Need to find other ways!!!

Anyone has any idea????

http://www.logicnest.com/archives/90
- http://www.winxptutor.com/wsaremove.htm
http://en.kioskea.net/forum/affich-22087-xp-auto-log-off

Basically what they advice is that we need to have a Windows Setup CD.
Enter the Recovery Console

Boot the system using the Windows XP CD-ROM. In the first screen when the Setup begins, read the instructions press "R" (in the first screen) enter the Recovery Console. Type-in the built-in Administrator password to enter the Console. You'll see the prompt reading C:\Windows (Or any other drive-letter where you've installed XP)

Type the following command and press Enter.

CD SYSTEM32
(If that does not work, try CHDIR SYSTEM32)

COPY USERINIT.EXE WSAUPDATER.EXE

Quit Recovery Console by typing EXIT and restart Windows.

You'll be able to login successfully as you've created the wsaupdater.exe file (now, a copy of userinit.exe)

Now, change the USERINIT value in the registry (see Phase II in this page) and change it accordingly.