My World My Way help...HELP!!!

I just downloaded the game "My World My Way" but I keep on getting a errcode=81 or something.
I'm using an R4i-SDHC.And another thing, for the Wood DS, which file do I put it in?
What I mean is that, I have done almost everything, putting it in the moonshl2 file, R4iMenu file...
But nothing seems to work...
I really need help with it.So please help me =)