The FSB dont change when I change it in the BIOS!!! Yesterday I had it boot up at 933 but locked up, then I had it stable at 735 now it wont go above 700!!! What gives??

Abit VT6X4 SlotKet III PIII 700 Stock hs+fan for now
256megz pc150 kingmax (2*128)
Leadtek WinFast S320II Ultra
IBM 75GXP 15Gig
Aopen 52X CDROM
Smart and Friendly CDR
Adaptec SCSI Card
RealTek 8139 NIC

PLEASE HELP ME!!!!!!