asus a8v delux +suse 10

Since I am not holome 4 days a week, I turn off my computer with the above board with amd 54-bit processor. When I return and turn on the coputer, it often seems to have lost the bios settings and cannot boot. I go into the setup, boot, and it is trying to boot from a floppy, which it does not have. I reset it to the correct drive, and everything will be ok for a few weeks. Any ideas why it would lose its bios settings? Art