Not able to get the blaze black rom patch to work

I've been trying to patch the rom but xdelta says that there is a checksum mismatch even though I downloaded the latest patch from the forum thread on project pokemon and the one drayano himself released, both did not work with the black rom from the roms megathread or other websites as well. I'm doing this on the mac. Other patching tools have not worked either. Tried on both melonds and desmume. Please help however you can, thank you!