it could be that you have to blow out the the dust in your nds gba slot or EZ 3-in-1 expansion. It could also be that it's not inserted fully or properly in your nds. Or else i really don't know because i also ordered one from DX and i have yet to try to use it
Tell them to get the DSTT cause you can get it for less than $10. And my friends never listen to my recommendations even though i recommended them the Cyclo and other good carts
One good site to order from is realhotstuff.com ships really fast and you can bundle in a microSD card if you want.If you want just a m3 real then go to http://www.realhotstuff.com/real-rumble-fr...rosd-p-256.html. It also comes with a free 1gb microSD. If you want the M3 real with the gba...