For anybody else asking about ARDS / B/W incompatability, my friend Reklaw_Vahn and I tested a few things with what equipment he has (a DSLite, a physical imported Pokemon Black Version (JPN), an ARDS V1.52)
What could it be? We figured it was one of a handfull of things
The AR itself was broken (busted, it worked with other games)
The game itself was broken (busted, it played without the AR)
We had the wrong Game ID (busted, we followed Datel's steps to find the Game ID and it was the same as what's on this and other sites)
The codes were bad (busted, he deleted all the codes and only kept the Game ID and the game still wouldn't start)
The firmware version of his ARDS was not compatable with Pokemon Black/White Version (JPN) (could very well be as apparently from what I've read on the translated Datel Japan site, they needed an update to their firmware version to play B/W (JPN) too.