HELP! MEMORY PROBLEM

Hey guys. Maybe you can help me. I have commando mobo. Im trying to run 2g of Super Talent DDR800. It will only load up with one stick though. Is there a setting in the bios I need to change? I have XP Pro. I mean 1 g is great still...but I paid for 2 if you know what I mean.

Try running with one stick at a time. Possibly one stick is dead, or for some reason your motherboard is having a hard time with the density of the chips. You may need a BIOS update.

Yeah I have one stick in there right now. I just wasnt sure if I had to place them in certain slots or not. If I swap out sticks it won't post. Must be a DOA. I guess I will have to RMA them. Of course I will be without a computer for a bit