If the BIOS doesn't see it, neither will Windows.
I have run across machines with this issue but the owner forgot to plug in the new SATA power plug as well.
running intel e6750, asus p5kse, 2x sata seagate HD's on vista business
I have windows running and bought the Samgsung SH s203 dvd writer and im trying to get it installed. I plugged it into sata port 3 on the mobo. when i boot up it doesnt get recognized by the system. Ive gone into bios and designated ports 3/4 as cdrom and that hasnt worked. Ive tried all combinations of plugging in the 3 sata drives into the sata ports. no dice. Anyother ideas?