More information on both your system and film clips are needed. See.Got a problem? Here's how best to ask for help. (this link is to 'Announcements', you may need to click through them to find the "got a problem! announcement).
Insanity is hereditary, you get it from your children
well im using a canon vixia hf10. i have other clips that render just fine, but all of a sudden they just stopped and i dont know why. im using windows xp.
Is the Work Area Bar (the light gray bar along the Timeline's "ticker") extended over your entire project?
Only clips under the Work Area Bar will render.
Here is a look at the WAB:
I think that that image is from PrE, but if it's from PrPro, don't worry, as the WAB works the same for both programs.
BTW - to easily extend the WAB over the entire Timeline, hit the \ (Backslash key), to zoom the Timeline out, and then look for the little "box" in the middle of the WAB and click it. Boom - the WAB will cover the entire Timeline. I find that quicker than drag, scroll, drag, scroll, etc.