I find my Dynalink RCU can't control/pair the box. (Including voice control) What can I do?

Please follow the steps and check again,

1. Check the battery voltage.
2. Make sure the RCU to box close enough when pairing.
3. Goto " Setting"->"Remote & Accessories".
4. Choose the BT remote and choose "Un-pair".
5. Restart the box.
6. Hold "Volume +"(Not “Volume –“ ) and "OK" key together around 3-4 seconds until the red line blank 3 times. (make the remote factory reset)
7. Follow the pair steps that box indicate.
8. If it doesn't work after step 1->5. Please try to factory reset (The path: "Setting"->"Device preference"->"About"->"Factory reset") of box.
9. Please contact to customer service if it still has issue.