Use the newer Evox bios. IT is called Evox M7 bios. Dont bother with the older bios. It will work perfect with your Matrix Mod Chip. You can get them in #xbins on Efnet (Mirc)
You can find he M7 bios at: http://www.x-tronix.net//index.php Or the D6 if you really want it at: http://www.console-concepts.co.uk/xboxdownloads.htm