I had the same issue and if you do a search in google you'll find its a common problem with 64 bit os.
I have mine installed and working but when ever I reboot the pc I have to physically walk over to the filter wheel and unplug the USB cable wait for a few seconds then reconnect and it world no problem after that, but I have to do this every single time with out fail.
Upon reboot the computer recognises it as a new device and try's to install the driver, fails and tells me that there was device was not recognised. I then unplug and replug and it works.
Go to Orion's website
http://www.telescope.com/Orion-Nauti...25/p/99273.uts and download the latest driver.
Go into the device manager and right click on the device and updat the driver. You will need to hand feed it and manually tell it where the driver is located.
This is the only way that I could get it working.
If you find a fix let me know, I'm all ears.
Cheers
Sandy.