Hi,
When you install the drivers, make sure you use the one from the correct folder (the one for W7 64bit) and try right-clicking on the .exe and select Run As Administrator. If all fails I'd probably try the MikroE forum or support. I'll see if I can make a go at it with my board (it's about time I set it up anyway) I'm running W7 64bit as well.

/Henrik.