Hacking Question regarding USB Game Channels, Tatsunoko vs. Capcom

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Hi,

I have the game on my HDD and it boots fine through the official USB Loader without any Problems. I got a PAL Wii and i remeber patching the ISO which was a japanese one to PAL.
Than i created a USB Channel for that game. The code is RF7J08. So the Code says its still a Japanese Region. When i try to start the game with the USB Game channel it doesnt work. All i get is a Green Screen.

Anyone knows why? I mean it worky perfectly with the USB Loader.

Thanks!