After you press F6, at some stage, you'll be asked to insert a floppy for the SATA disk controller driver. Do you have it? If not, the driver should be on the motherboard CD, just find the right folder and copy on to a floppy.
If you know the model of your motherboard, you can also download it from the mobo website.
On some BIOS, there is an option to set the SATA hdd as a legacy IDE or something like that, in which case if you select that, you don't need to install the SATA driver.