Are you able to see the device in the device manager?
IF so, does it appear in the "USB Controllers" list or the Other Devices lis? If it appears in the "Other Devices" list, you need to manually bind the device to the driver. The driver is present in the FX3 installation folder.
If it does not appear in the Other Devices list also, please try any other image files, (from FX3 SDK Example project list). Basesd on your observations, if things do not go well, please create a Tech Support case.
- Madhu Sudhan