What EFI setup are you running?
FAST EZ EFI here. It was simply plug and play for me. Wasn't hard at all and worked like a charm right out the bag. Follow the instructions to a tee and it was fine. Im very pleased with setup. Just a little dissapointed that they came out with the 2.0 version a month after I got my setup. I would have waited a month for the new one.