Sounds like you have done everything right. There is nothing special you need to do to get that map to work correctly. I would guess that maybe one of the files for the map is corrupted. If I were you i would redownload the map and reupload it to your server also redo your redirects.

You can download the map from here: http://www.dfbgaming.com/modules.php?name=dFb_Maps

I just reuploaded the map to make sure it's the most current version of it.

Hope you get it all sorted out.