Specifically a Phoenix BIOS password.
you can't really 'recover' a BIOS password, either you find the aforementioned backdoor/universal password for this particular BIOS (not all of them have one.) or you'll have to reset the CMOS which will clear the BIOS password. refer to your mainboard manual.
BIOS' sometimes have backdoor passwords. Some that may have been used for a Pheonix bios include: BIOS, CMOS, phoenix, and PHOENIX
Alternatively, you could open the computer and remove the CMOS battery, as well as physically unplug the computer, then wait a minute. This should reset the BIOS to factory defaults.