[xubuntu] s-video card acting up

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http://ubuntuforums.org – with Jaunty Xubuntu on a Dell Dimension 2100 with an ATI Radeon 7000 Using the s-video output on the video card, I am able to see everything fine with the manufacturer's screen, the bios, grub, and the splash screen, but after that, the screen goes blank. from a live cd, it's the same thing, I get through the language selection, select "try xubuntu...", then the splash screen, then when it should get to the login screen, nothing. I tried inputing my login and password, and I could hear the computer working, so everything's loading fine, it's just not outputting to the TV. I also tried adding Option "TVDACLoadDetect" "TRUE" to my xorg.conf under "device" over ssh and rebooted, but that didn't help anything. thanks, david (Hardware)