now i got it:
you are using a TV and only a TV as your monitor...
the question is: where do you connect the TV to, the first output on the video card or the second one...
normally if you do follow my instructions, it will work if you put the TV in the second output (the TV-out).
but can you post the /var/log/XFree86.0.log file as an attachment, so I can help you further, btw: what distro are you using, mandrake 9.1?
Alien is my name and headbiting is my game.