Sega-Naomi

I have a Naomi 2 System with GD ROM drive, I have various carts and GD Roms, bought off ebay a GD Rom of Guilty Gear XX : Reload, I have the regular IO board with Audio amp etc, not the Capcom one in this setup, when in test mode it comes up as GG USA, but when booting it comes with error 02, any thoughts or help would be great, just getting into the Naomi stuff and love it, thanks

Many questions regarding Error02 and region coding can be found in the FAQ section. First, find out which BIOS version you have (see FAQ) and work your way from there. :smt045

Had the same problem with GGxx reload, JAP bios solved it.