I have Pretty much the same problem, I was using vista and my IDE controller (SIL 0680 IDE) worked fine, but vista just wasn't working for me so I bought a copy of XP x64 and installed it. I used the IDE controller cd-rom to install the SIL 0680 driver and it installed but I still cant see my drives , not even in the storage manager, I flashed my bios on my M2N-SLI Deluxe to the newest one and it's still not working. I have four drives two of which are plugged into the controller. I've tried installing different versions of the driver but when i update it says that the currently installed driver is better. If anyone has any ideas it would be much appreciated.