Double check to make sure you have the right model number for your motherboard. Foxconn's Legacy Motherboard List only shows two Intel 845 based motherboards, the 845GV4MR-ES and 845M02-GV-2L.
Perhaps you should use CPUz's Mainboard tab to check what chipset you have.
When you know that, you should be able to easily narrow down which board you have on Foxconn's site.