Can't get to 166 or 200 FSB?

Well, i think i got a problem. I went into my BIOS to see if i could get my FSB up a little bit from 200Mhz so i set it at 220Mhz (I have BH5) to see if it would post, it didn't and my comp wouldn't boot back up. So I went and reset the CMOS through the jumper like i've done before when this has happend and started the comp back up. When I went to put the FSB back at 200Mhz the comp just wouldn't boot again. So i reset the CMOS and tried to go to 166Mhz, nope. I got it to post and boot at 150Mhz but I didn't try anything higher. I then tried reflashing the BIOS with the most recent version and that didn't do anything. So I don't know why I can't get to 200 or 166 FSB. It's never done this to me before.

Well I got it to work now, up to 200Mhz. I guess it just didn't want to work at the time. wierd... Stupid epox...