[ubuntu] Forcing nvidia-settings to use different refresh rate on TV-out?

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http://ubuntuforums.org – I have an nvidia-card: Code: nVidia Corporation NV44 [GeForce 6200 LE] (rev a1) USing nvidia-settings to configure the TV-out results sometimes in color, but mostly in black and white. The problem is the TV's refreshrate. It is an old PAL-B TV, and therefore it uses a refreshrate of 50hz. Nvidia-settings sometimes recoqnize this, but mostly it is outputting a refreshrate of 60hz. So I'm wondering if someone knows a way of forcing nvidia-settings to use another refreshrate. I know of the button in nvidia-settings, but it is greyed out. I would really appreciate some help... (Hardware)