Backup Manager will only launch discs

Hello. I recently jailbroke my ps3 with an ipod touch 1g and installed backup manager. I tried loading Littlebigplanet off of an external hard drive, but when it boots me back to the xmb, Rock Band 2, the blu ray game currently in the ps3 shows up. When I play rock band 2, the screen is black, but the music plays.

I then tried putting a ps3 game in backup manager and installed it. The installation was successful, but again, Rock Band 2 shows up instead of the backup.

Any suggestions? Thanks.