The board can't read the speed because the processor doesn't tell. It is up to you, the person who assembled the machine, to SET the correct front side bus frequency.
And yes indeed, how you do that depends on how your particular board implements it. There might be jumpers, there might be controls in BIOS setup, and there might even be both. Read the manual, and if still unclear, ask again here, and this time please tell us what hardware you have there.