windows movie maker problem

How do I fix this mic problem in Windows Movie maker?
Ok I have an OLYMPUS FX 3000 camera and when I replay it with windows media player, the sound is normal. Then I place the vid clip in Windows Movie Maker and replay it, the sound is all screwed up. It sounds screechy and fuzzy. How do I fix this prob. I need to know so I can do more vids on youtube.
Thanks-no stupid answers plz.
Just what format is the film and sound in that you are trying to
put in WMM ?
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How to Convert a Windows Movie Maker Video to Youtube