IFO EDIT gives an error when I press the PLAY DVD button...

The DVD sample could not locate a DVD decoder on your system.

You must install a third-party DirectShow-compatible MPEG2 decoder, either software or hardware based. Microsoft does not supply an MPEG2 decoder with Directshow or as a system component.

Please contact your DVD manufacturer for a decoder.

The sample will now exit.

I have both PowerDVD 4 and WinDVD installed. I thought these were MPEG2 decoders as well as DVD decoders3

Does anyone know how to fix this problem?