transformers rotf multiplayer will not work

it will not detect the other player in multiplayer even after 5 minutes. please help, thanks

What are you using to play it?

i am using an r4. for other games, the multiplayer works though..

Is it a clean dump (no patches?) or have you patched the arm7?

yea its a clean dump
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ok i just tried again and the multiplayer will only work with the downloaded roms. it wont work with the game i bought from the store