firstly, try removing the device (I mean from device manager, not physically) rebooting and seeing if its redetected properly.
You might wanna swing by the web site of your motherboard's manufacturer, or even go to windowsupdate.microsoft.com for a possible motherboard chipset or IDE controller driver update.
Also, ensure that you have S.M.A.R.T and UDMA enabled in your BIOS. Without these things, a lot of strange things can sometimes happen.