gigabyte 8iexp mobo and new RAM

Hi,

I had two 512 MB PC 2100 RAM on my gigabyte 8iexp rev 1.2 after I installed 1 gig additional ram PC 2100 as well. The BOIS is only picking up 1.5 gigs of RAM. I tired all differnt combinations thinking maybe the 1 gig stick needs to be in a specific order but no luck.

I am trying to figure out why is it not picking up the other 500 megs. I have the upto date BOIS version. Please help!!

- Ken