Asrock 939Dual sata2 not recognizing new sata2 drive on 1.5 sata connector

[Sandan]

I have a big problem. I have the Asrock 939dual sata 2 board with the 3800+ x2 processor, 3gigs Ram, running Vista ultimate. My operating system is on an SATA2 Western Digital drive attached to the SATA2 connector. Just bought a Seagate ST3640323AS 640GB 7200 RPM 32MB Cache SATA 3.0Gb drive. Connected it to SATA 1 connector and it won't get recognized. If I connect it to the SATA2 connector it is seen and then I put the WD drive on SATA 1 and that one isn't recognized. Tried both of the SATA 1.5 connectors and same issue. In bios I have set to auto detect on the non-raid mode for the 1.5 SATA connectors. Anyway....are there special drivers needing to be installed for Vista to see drives on the 1.5 connectors. Or do you think SATA 2 drives on this board won't work on 1.5 connectors? Thanks.......
ps. sorry for double post but I also put this question in the running thread for this.

 

[limsandy]

They are backward-compatible. You could try re-installing the SATA controller drivers from Asrock's website or NVIDIA's 6.84 WHQL-certified drivers. That, or try swapping out with a different cable, if you have a spare.

 

[Peter]

Nope, that's a speed negotiation screwup in the SATA-II spec. This causes 3-Gb capable drive to not link up on SATA-I controllers.

This is a double-posted thread btw. Long form answers in the other one.