ABIT KT7A-Raid & ATHLON 1.2 with 266 fsb

I just built a new machine with the ABITkt7A - raid, and Tbird 1.2mhz and 266 FSB, after setting up hardware, on the softmenu if i select 133/33 with 9x multiplier it wont work, after trying it a few times i had VGA problems and now my processor aint working, why is this? it would work only if i choose 100/33 with 12X multiplier. isnt the "A" suppose to stand for 266 fsb support? help!!

Thanks for your reply, i forgot to mention that i checked my chip, it sez A1200AMS"C", i dont have a picture of it that i can show you though I bought the chip at XANDER hongkong. Yes, i tried it before and it worked at 100/33 but now whatever i do nothing happens because everytime i turn on my comp it cant send a signal to my monitor. I tried using a 1.1 athlon "b" and it worked properely. But that waz my girls processor that i just borrowed though

thanks, i checked my chip and it does say:

Axia0113BPBW