You have only a single SATA drive, so you cannot make any RAID. You need at least two SATA-disks to make a RAID-array. So, leave the SATA controller enabled, but don't set the other option to RAID. Set it to Single Drive, IDE or whatever you can choose from.
In case you can choose in what way to enable the SATA-controller (if there's only one thing to set), just set it to SATA, not RAID.
PS: Sorry for my bad explanation - I'm not familiar with the board and the way the bios looks ... but I hope you can manage. Just don't select RAID anywhere, okay?