Pokemon Platinum help!!

hey guysive got a problem and i dont know if it is anything i have done or whether it is the rom but i have a R7 DS card and i have downloaded pokemon platinum the US version. First it would work and i read on the fourms that i needed to arm 7 patch it so i did all that and it worked fine. then i thought why dont i trade my pokemon from my pokemon diamond which is the acctual game and the EU version. so i put it in my other DS and try and trade but the signal in the top corner always has no bars and is red. it then says after a minute sorry im busy maby another time but nothing came up on the other DS. What is going wrong???

Arm7 patching sometimes ruins the Wireless play. If that happens you can try to fix it by using a different Arm7 from a different game.

ok thanks very much shall try again