you have not said what motherboard or chipset
can you bootup (and see disk) from Win 7 dvd if you have a ordinary sata hard disk instead of SSD ?
(it would be rare if Win 7 did not have correct AHCI / sata driver, NOTE sata driver is for controller not disk)
normally you leave bios setting for sata controller to ahci to take advantages of all features of SSD
occasionally there are compatibility problems with sata III disks on sata I or II controllers.
(often fixed by jumper on disk or bios setting)