I also got my x2pro and I can not get the bios to flash.
I had a LPC mod already installed which worked like a charm. I just replace the LPC with the X2Pro and try to flash using Win98, WinXP, my Dell Notebook, some BX board, a 3feet cable, a direct connection. Just everything. And I checked the soldering and the header pins with multimeter and I get all ok. Well, should for the LPC mod worked like a charme.
As the people said, I don't hink that the chip is faulty but the weird application is very very tricky. Why can' there be e.g. a simple DOS program so you can do your first batch using your plain old DOS 6.22 boot disk? Any help is really appreciated. I ain't no pro but I've gone through everything ever said and written about to slove my problem.
I even bought a 2nd X-BOX just to see how it behaves!