You need to call customer service. I e-mailed them a month ago and got no response.
Over the phone, they gave me an RMA number even though I couldn't supply the serial number of the board (I was at work). Problem is, I am on a Navy base in Japan and they don't ship U.S. Mail, so I have to have the replacement board shipped to a US address and forwarded to me (what a bummer!).
And I don't have my hopes up on getting a replacement board fast. This is a rare A7V133, Rev. 1.05, with RAID, and I'm gonna insist they replace it with the same board that is supposed to accepts XPs (wish me luck). They better not send me an A7V133-C with no RAID.
Heck, by the time I get the board back, the XP1600 I bought 3 months ago will be passe and down to 700 Duron status. Never could get an OS installed with the chip (boot fine but floppy port problem).