[HELP] ASROCK AD2700-ITX (ami Aptio)

[icaro96]

i need a help, i broken my bios of ASROCK AD2700-ITX (due to wrong flash), i can't reflash... i have a work ASROCK AD2550B-ITX a similar mainboard.
I try a change a bios chip between them,in the 2700 with a bios chip of 2550b show the image startup of 2550b and no more...
I try:
boot in dos or win the 2550b and a complete loading SO (win7): i try a change the bios chip and try a reflash bios 2700 and result:
Error: Rom image layout detected RomHole is redesigned.
:-\
How i can try?
thanks