Mario and Sonic Winter Games (U)

Ok here's the problem I've been playing M&S at the Winter Games and have ahd no problems until someone wanted to play against me. I went to single card play, created a group, it started downloading on the other DS then stopped and went red on the signal icon. Any help would be nice, thanx in advanced.Running R4DS 1.18

Prehaps the signal got cut out prehaps.Keep trying, otherwise I'd blame the r4 since it's not officially updated, maybe there is a patch I don't know...it runs flawless on my acekard.