I have a corrupt asf file that i require to fix, it plays the first bit of the video but then it stops and comes up with a corrupt asf file error. I have tried repairing it in asftools program and when I go to advanced repair it comes up with the error

bad chunk signature message comes up.

the asf file was oringally part of a winrar set, however i didn't have the first file (.rar) so I substituted another file in the set to extract the archive. So the bit that is playin on the asf file is actually the substituted bit i used. I really require the other bit!!!!

any suggestions??????