Try rebuilding the database before doing the adrenaline easy installer again. Usually it will when is installed but maybe something broke and needs fixing before time.
How do I do that? I thought rebuilding the database was something you had to reset the system to do, and if you reset the system it goes back to using internal storage.
No matter. I've got ARK-2 working now, although it doesn't have the bells and whistles of Adrenaline. That's a shame, because a lot of PSP games are as ugly as sin on a big screen TV. That grainy shader does them no favors on a display larger than five inches. Also, I really wish I could get rid of that stupid Playstation intro that pops up every time you start a game. You can skip it with circle, but it shouldn't be there at all.