Maybe you can try uninstalling your current driver and installing an older version? Did you install the driver yourself or did Windows 7 automatically do so?
Windows installed the driver initially, however, I installed the latest driver from the manufacturer. I don't think the older verison will work, I attempted to install the drivers that came with the mother board, it wouldn't install. There was an odd error code, I don't remember which. I found the latest driver and though would be the magic bullet
... That wasn't the case however.