I've tried reintalling BUM but that didn't work too .. I've tried backing up a few different games, but no luck ... I don't understand, BUM itself is running fine, only its 'mounting' function isn't working ..
I just did complete format of my PS3 system (selected the 'Restore PS3 System' option in settings), and even now backups are not being loaded .. I can install homebrew apps (FTP server, BUM, etc ..), only backup loading isn't working, as if its either not working, or like its not patched or something (although im using the patched version), or something else ..