ISO games won't load

[tsekov]

I am having M33 3.52-4 firmware and every ISO game I have tried has crashed(not the console, just the game itself) while loading(all show blask screen after the Sony logo and only OutRun started and wnt to PRESS START BUTTON screen but after pressing Start it freezes and when I try to exit the whole console freezes on the Please wait... screen. What settings or something should I do? I am new to all this custom firmware stuff and don't have a clue. From the Recovery menu my UMD settings are set to Sony's no-UMD drivers. I will be very thankfull if you provide me with some other important information for this firmware(currently all I know it can do is playing games, videos, audio and know there are such things as irShell, DevHook, PSX Emulator but don't know from where to get them or how to use them). I don;t have the demo UMD that came with my console no more so I don't have any UMD's. Can I use my console without one?

P.S.: Аз съм българин, ако случайно има някой друг сънародник тук - да пише