Phoenix BIOS version for 80GB HD

I am trying to install a 80GB hard drive in a system which is running Phoenix 4.05 BIOS. When I try to auto detect the hard drive it only shows 8455 MB. On reboot the computer then locks up. I am assuming the version of BIOS does not support the memory size. I am trying to fid out what version I require and where I can get. Any help would be appreciated. Thanks, Andrew