I recently completed a clean install of Windows XP. After updating my computer and re-installing my programs, I've run across a problem with my ATI-TV Wonder card. I am able to correctly view TV signals from both the TV Tuner and Composite-In sources. However, whenever I select S-Video as a source, I am only able to see a blue screen. I receive audio just fine with S-Video, but it's just that I'm unable to get any picture other than the blue screen. Are there any ideas as to what may be causing this?

My system is as follows:
633 MHz Intel Celeron
64 MB RAM
20GB 5400 RPM Generic HD
100GB 7200 RPM Western Digital HD
ATI-TV Wonder PCI Card
Windows XP
Virtual VCR
ATI MMC 7.1