Some episodes not working.

I posted a thread similar to this in the BT help section of the forum, but my problem has changed somewhat and I figured this would be a better place to put a thread like this. I downloaded a batch of episodes of Kyou Kara Maou. Episodes 1-9. While some of them work episode 4, 5, and 9 don't work and it keeps saying the files are corrupted. I don't understand how they could have gotten that way...and why they aren't working.

Can anyone help me out or tell me where I can find these episodes elsewhere to download so I can actually watch them? ;_____;

Reposted for convenience from the BT Support Section

The first thing you'll probably want to do is do a CRC32 checksum match with your files to make sure they aren't corrupt.

If you're running Windows, you'll want to download this utility and check your files.
http://members.lycos.nl/winsfvfaq/

If the Checksums match up, then your files aren't corrupted. So we've got to look at other things.

Make sure you have the latest Codecs required. I don't know which one Kyou Kara Maou uses, but I'm willing to place money that it's either DivX or XviD.

For DivX codecs, go to www.divx.com

For XviD, you'll need to find the binaries yourself.
I've had good experiences with Koepi's release.
http://www.roeder.goe.net/~koepi/xvid.shtml

And if you continue to have problems, something else on your computer may be causing the problem.

Hope this helps.