I could not find any verified technical documentation or official driver package specifically for a "u-706 joystick driver" in standard hardware or gaming peripheral databases.
Technical Details
Internet Archive: Contains a legacy USB Joystick Driver (2011) that works for many generic vibration gamepads. u-706 joystick driver
Are you encountering a specific error message (like "Device Descriptor Request Failed") or is the device missing vibration functionality? I could not find any verified technical documentation