Viewing dvd rom on television

I’m having trouble trying to get DVDs to play on my television using the TV OUT socket on my computer. The drive is a Samsung SD-612, the graphics card is a 32MB Riva TNT 2 AGP. The software I have tried is Power DVD which gives me an error message: Error code F54564P5 - which tells me that I cannot view DVDs with macrovision (which is 99% of DVDs!) using the TV OUT. The other software I have tried is ASUSDVD which lets me play the DVD but no picture, only sound! There HAS to be a way to do this but cannot work it out on my own. Any suggestions anyone? Thanks!:mad: