M3 Real won't start

Hi!

My girlfriend did just get a DS lite from Canada (we live in Sweden). We bought a M3 Real here in Sweden. But it didn't turn out to work at all =/ We have played some other games on it, and these work. The M3 Simply does also work excellent. I myself own a M3 Real, and this doesn't work either in her DS. But her M3 Real does work perfectly in my DS Lite.

We have tested alot of firmwares and such also, but nothing seems to work at all. It just skips to load the M3 real =(

So please, anyone having any ideas about what to do, please write them here, becuase every advice is needed! Thanks in advance folks