CFW 5.00 problems

Hi i am new to this. I just upgraded my sons Phat to CFW 5.00. The psp works fine but will not play games from the memory stick. It will read them and start to launch them but after a few seconds the screen diplsys thr following message;
This game could not be started(80020148)

Any help
Please.

Used pandoras battery to perform the upgrade

John

ok, simple fix, you just dont have the game mount set correctly, press the select button on the main menu(XMB) and go down the UMD ISO mode change it to Sony NP9660, load up your game, and its good too go!

or

you can simply put in a umd if you dont own one, just use the firsth method!