So, I have a japenese version and an american version, one on the ds lite, and one on the 3ds, I tried using the infra-red connection but it wont work, any ideas? I want to trade between my old and new game...

...why is this on a 3DS forum again?

Because this is the LOUNGE.

Make sure the cartridges are pointed directly at each other.

and on your 3ds just check through any connections to do with ds models