I'm using a PSP-3000 with 6.39 PRO-B6 installed, and the popsloader doesn't work for me. For the record, i'm using the popsloader pack found here (http://forums.dashhacks.com/f118/popsloader-pack-for-6-xx-pro-cfw-t298694/) and am trying to play digimon world 2003.
Edit: Oh, and the problem...