Gta chinatown wars multiplayer problem.

I have a cyclo ds on the newest firmware (not the beta). so 1.59.
Is there a option or patch which makes the multiplayer working.
i have tried this:
rom v.s real game (i have one copy)
= didnt work (freeze)rom vs. rom
=didnt work (freeze)i tried the arm9 patch(ed) version but it still froze.
So does anyone know how to fix it?
thnx
noahhaon#EDIT
i have tried it with the clean rom but it didnt work

Download a clean rom and try again.

i did that before, but i didnt work