Try a different copy of the game, I coped that game successfully with ORIGINAL open manger and a ps3break v1.0 while waiting for my board to come in the mail 3 months ago... played it and beat it from beginning to end no problems.
That Game can be downloaded to internal and external. try both. Your manager is not your issue , you dongle or modchip board is not your issue, nor is your payload, they are all way more advanced than what I used 3 months ago.
Any problems with other games?? If so your manager download might be bad try a different download from a different source. If you keep downloading Gaia from the same link, and OPM or Gaia is you problem, you will never know.
Use Gaia or OPM 2.1D or I, stick with the latest payloads, Hermes v4b for sure.
It is the GAME 100 percent sure. GOOD LUCK! And if you feel I deserve it, please +rep me