dingoo a330

[zx8001]

Hi,

I'm hoping someone is able to help me, I have recently purchased a dingo a330 handheld emulator, it has come with some standard emulators e.g megadrive, Gameboy advance, nes, super Nintendo etc which have some pre loaded roms on and they seem to work fine.

However on the mini sd card there are some program emulators, and that's were I'm having problems, the MAME roms will not load they go to a black screen which says loading for a few seconds and then switches back to the games list screen,the roms that are pre-loaded and one mame rom that I downloaded from here all do the same, I have checked and I have downloaded the correct version number. The same applies to the vice emulator roms.

Is there something I am doing wrong, am I not loading them correctly or something else.

Any help anyone could give me would be appreciated.

Thanks, Matt