I have also Purchased and Installed the driver on Windows 7 and I as well have had no luck. I think we are destined to not have this product work for us
I went as far as taking the Prodikeys Windows Vista Install disk , and replacing the Drivers portion with the downloaded Win7 Drivers I downloaded, And Still Squat.
I am disappointed, and ashamed to have wasted my money on a failed solution. I think it is time to buy a new Music Keyboard.