HELP GFX5200 ISSUE, DVD or movie in video window is dark and has bad colours

My monitor needs gamma corrections to display well colours in pictures. I
set the gamma display corrections in the display control panel, but that
doesn't affect the colours schema in the video overlay window where movies
are displayed. So, movie picture is dark and too red, no way to set a linear
colours schema with the overlay display control panel. I guess it is because
the video overlay has its own gamma correction circuit, but the detonator
driver doesn't offer the way to set it up.

I don't know how to contact NVIDIA to explain this issue.

Please, any suggestion for setup or how to contact NVIDIA?

Thanks for the answers.



My PC:
- amd 2000+, 512Mb-DDR PC2700, win xp sp1
- NVIDIA GF xfx5200 128M, agp4x-FW, detonator 44.03/44.65