Playing movies on tv through PC

Hey all, sorry if this is the wrong place to post this question. I've been trying to figure out where to put this for way too long.

I'm trying to play some movies off my pc (avi and mpeg files) on my tv. I have a radeon x800 (which has an S-video out) and on a winXP box. I know that isn't a traditional TV/Video card, but I thought it might still work. I am using the wire that came with it to connect the s-video out to the yellow A/V plug of my tv. I used the ATI Catalyst control center to get the video on the screen, which worked. I can see my desktop, icons, etc on my tv, but when I start a video, all I get is a black box right where the video should be playing, no matter what video player I use, windows media player or real player.

Does anyone know if there is a setting I need to change, codec I need to DL, or piece of hardware I need to sacrifice to get it working? Thanks.

Let me guess, you have a cloned display and the TV is the secondary display? There is an option in the catalyst drivers that allows to set overlay to full screen on the TV (dont remember what the option was called exactly). This will make movies play full screen on the TV and windowed on the PC, in my opinion this is the best way.

Branflakes, this option is the correct fix... it works beautifully...

And for anyone else that inquires, there's a similar function in the nVidia Control Panel to do the same thing...

nVidia Control Panel
- 3D Settings
--- Appearance
--- Performance
----- Monitor Temperature Levels

Good Day to you, Sir