5060 UDP not forwarding

Hi Guys,

Need some help, I create a policy with port forwarding on UDP 5060, but it not forwarding. I try TCP assign port 5060 and it was open although UDP is close. Any idea? 

below are my configurations:

Create Virtual IPs: TCP and UDP with port mapping 5060 (assign Public IP and local IP)

Create Virtual IP group: Add the TCP and UDP created.

Create Policy: frm: WAN --> To: Local Interface:  -->Source: all --> Destination: TCP/UPD created --> Schedule: Always --> Service: All -->Action: Accept --> Nat: Disable

Only TCP port is open but UDP is close. need help pls..

Thank you