I'm not sure if such old hardware would even have drivers for Windows 7.
Make sure you are installing the correct Chipset driver from the PCChips website.
If there isn't a Windows 7 driver, then look for the Vista driver, but using those might cause some issues.
With your setup, personally, I would have stuck with WinXP for sake of old hardware/drivers.
The only thing here I could think of, is that SATA port on the front is actually an eSATA port. I'm not sure if the Mobo you have supports eSATA. That would be my only idea.
Are you using the eSATA port?
If not, unplug the SATA cable running to the front of the PC from the Motherboard.
Take a look through the Motherboard BIOS and see if there are any settings for eSATA.