well, there is a way you can mod your chip or cpu socket so that the board thinks its a 200FSB chip...here is a link to a thread about it. I did it with mine, and it automatically boots up at 200FSB, not 133FSB. It was really easy, just use 2 short parts of a wire to connect 2 socket holes. I dont know if this will help you with your problem, but i guess it couldnt hurt.
<A HREF="http://forums.amdmb.com/showthread.php?s=&threadid=298163" target="_new"> link </A>
AMD XP-M 2600+ @ 2.6Ghz (12x216 @ 1.8v)
Gigabyte GA-7N400 Pro2
Geil 2x256MB PC3200 (2-3-3-11)
Gigabyte Radeon 9200 128MB VIVO
WD 36GB 10,000RPM 8MB SATA
Maxtor 40GB 7,200RPM 8MB ATA133