Primary Drive 1: not found

WHen i boot up my computer.. it wont take me to windows.. it comes up saying ” primary drive 1 not found, press F1 to continue, or press f2 to enter setup”

i tried the ‘fixmbr’ command in winxp recover using the CD.. can anyone tell me what this problem might be? and how i could fix it. .
i have a 120 gig HD, partitioned, 90 gigs – winxp
and 30 gigs unpartitioned, my windows xp , is on DRIVE C:, i formatted the WHOLE 120 gigs…

thanks