Graphics Tv-out Fullscreen causes slowdown?

Alright, i'm trying to use tv-out from my 6600gt to my television. I have it set up but when i put a video in fullscreen on it, the video slows down. Also, there are several lines that keep going up the screen, is there anyway to fix this?

I'm running the TIVO to svideo cord out from my pc, then have a s-video to s-video extender to a 50 foot s-video cord which is attached to my television. I never had a problem running the 50feet from my old Radeon 8500.

 

Have you read this? It might be related to your problem.

http://www.bit-tech.net/news/2005/05/02/nvidia_hdtv_corruption/

 

Naw it has nothing to do with that, and i'm not using a high definition television. The lines are more like interference lines that run up and down the screen, kind of annoying. Have to figure out what they are (Since i saw it is happening with my ps2 now).

However i am still having slowdowns, i'm gonna try reinstalling the drivers to see if that helps. I hope it does.


Edit: Alright, the driver update worked. However i still dont know whats causing the interference. Could it be the outlet the computer is plugged into?