ManaGunz and KH:BBS not launching

Good afternoon/evening!

Having recently entered the waters of CFW, I am attempting to launch my ISO backup of Kingdom Hearts Birth By Sleep through ManaGunz using the PSP Remaster Launcher. It “sees” the game but when I press X to launch, I just sit on a black screen. The icon for the game is the “Install Game” icon, so is this just not a compatible title, or should I check something else before launching?