What program are you using?
Try Stoik capturer (freeware):
http://www.stoik.com/products/morphman/ ... pturer.htm
Records and also converts to a suitable format (I recommend Windows Media 9 for maximum compatibility)
There's also Virtualdub, but not too friendly.
In Windows, there's Windows Movie Maker, included in XP. A little bit ugly, but can separate audio and video.
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One of God's own prototypes. Some kind of high powered mutant never even considered for mass production. Too weird to live, and too rare to die.