SLI impossible for video playback?

I am currently running two 7600GS's surrounded by SLI and I'm having trouble beside my video playback. I can play games flawlessly, but when I am watching DVDs, it looks like it is person displayed as interlaced. There are bars appearing everywhere action take place. Is this a problem with my SLI configuration, or do you suggest it is a my video codecs. (Standard Vista Ultimate Codecs). The problem is the same contained by both Media Player and Media Center.

SLI impossible for video playback?

I WOULDN'T THINK SO, BUT YOU CAN CHECK ON NVIDIA.COM. THEY HAVE A SECTION TO COMPARE VIDEO CARDS

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