The first thing to do, is to go to Start > Run > diskmgmt.msc
This opens up the disk management utility where you can manipulate your partitions etc.. New drives typically don't come formatted, so you won't be able to see them in Windows until they are partitioned and formatted. If you see two drives that are 'unallocated', then right click on each one and create a partition and have XP quick format them.
If you had to create partitions, then your problem should be solved. If the drives did not show up in diskmgmt.msc, then you have an issue with your SATA driver, BIOS/controller configuration or physical installation.
Next, you should try drivers. Have you used the one from ECS yet? It's actually pretty recent. Here's a
list of drivers for your board. According to their website, SATA and RAID are integrated into the board using an nVidia chipset. You can get the latest reference drivers ("generic") from
www.nvidia.com
If THAT doesn't work, then I would check your BIOS configuration. You can get into your BIOS by tapping the DEL key during POST (the very first screen displayed when you turn the PC on). Make sure your SATA controller is enabled. There are some other options too that we can play with, but we'll save those for later until the other stuff here doesn't work.
And if the BIOS doesn't detect your drives, then you have a physical installation problem (Most likely). It sounds stupid, but check your cables and make you have both power and SATA cables connected to your drives. There really can't be much more than that though.
