NDS Emulator

Hi there, just found this site as I was looking for some nds roms and this site helped heaps, (thanks romulation!) but the nds emulator i had wouldnt play the roms, no$gba i this it is, ver. 2.2, i open it up, click file, open so the insert cartridge window comes up, select the game and bang a little message comes up saying the games fallen through (cant remember exactly what it said). is this a problem with the emulator? if so does anyone know of a location for a working emulator?

NDS emulators are still in development and don't really play many games to a point that its bearable at this time unfortunately.

ahhhh ok lol solves that problem then :P oh well guess ill invest in buying one till a decent emulator surfaces lol thanks!