Help im constantly getting crc errors

have xpsp1, dx9b, tried two cdrw, liteon, teac always the same problem so it must be software. im clueless.
i have abit nf7-s,with newest nforce drivers(the ones without crappy nv ide driver). i can burn for example divx, nero says burn ok(and i’ve tried different versions of nero too), i can watch it but when i try to copy it back to hard i get crc and cant copy it anywhere.