Problem with MGS4 Guns of the patriots

I'm on HEN 2.3.1 and I don't have any problem with PS3 games, except for one. I can load MGS4 Guns of the patriots, but it gets stuck in the loading screen. Waited for up to 10 mins but nothing. I tried downloading the videogame from other sources but nothing, and the same game works fine with CFW. In this particular case I'm converting the PS3 folder to an ISO. I tried everything and nothing seems to work.

Any piece of advice?