Image distortion when exporting MPEG2

Hello
I am using FCP 4 and exporting a 3min piece of footage using QuickTime Conversion to to DVDSP 3. The piece of footage is quite dark, however when I export it as an MPEG2 to it becomes even darker and the colour is slightly distorted (has a redy hue).
Is there something i can do to stop this, is it something to do with the way I am exporting it?
Any suggestions welcome
cheers
Ruth
combo eMac Mac OS X (10.3.6)

Try this on the Final Cut Pro forum.

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http://postimage.org/image/jjcef8ebt/
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