DVD Video Distorted

I just bought a Sony DRU-820A with dual layer burner, and for some reason when I play a movie on it and use my Zenith 31" tv's SVHS din input and ATI Radeon din output it get's a distortion at the top of the screen it will happen on any DVD. Any suggestions? Am I not supposed to be able to play movies on my computer?, I use WM 9, PowerDVD for XP, and QT 7 it also has Gigapocket installed so I'm able to record from my satalite to the harddrive and playback anytime I want. I wouldn't think I needed a Video Stabalizer. My CPU is a Sony Vaio which has been the best, my video card is a Hightech Excalibur Radeon 9000 256megs with dual output. It would be nice to transfer my kids tapes to dvd.
Thanks Johnny aka: El Perro Grande