Have you tried putting it on a different SATA cable and to a different onboard controller slot? It looks like you have:
2 x SATA 6Gb/s connectors (SATA3 0/SATA3 1) supporting up to 2 SATA 6Gb/s devices
4 x SATA 3Gb/s connectors (SATA2 2~5) supporting up to 4 SATA 3Gb/s devices
1 x mSATA connector
* The SATA2 5 connector will become unavailable when the mSATA connector is installed with a solid state drive.
Support for RAID 0, RAID 1, RAID 5, and RAID 10
* When a RAID set is built across the SATA 6Gb/s and SATA 3Gb/s channels, the system performance of the RAID set may vary depending on the devices being connected.
Marvell 88SE9172 chip:
2 x eSATA 6Gb/s connectors on the back panel supporting up to 2 SATA 6Gb/s devices
Support for RAID 0 and RAID 1
Make sure the controllers are enabled in bios too or you won't see anything.