Death Note: Kira game DS Multiplayer

So I have the Death Note: Kira Game cartridge as well as a rom of the game. I have two 3ds and one ds lite console and I wanted to try the multiplayer mode of the game with my other consoles but failed. When I open the DS Download Play the game doesn't appear no matter if it's the cartridge or the rom. So I'm coming here to see if anyone has the same problem as me or if anyone has tried to play the local multiplayer for this game...