[Serusers] Ser+Media proxy

[KM]

I have installed SER 0.9.3.2  and media proxy 1.2.1 on the same machine.
The machine is on public network.
Calls work ok except when I have a UA on a LAN behind NAT calling to a UA that is in the same LAN.
In this case I get :

+----------+-------------------------------+--------------------------+| username | contact                       | received                 |+----------+-------------------------------+--------------------------+| 22000001 | sip:22000001 at 192.168.1.7:5060 | sip:xxx.xxx.xxx.xxx:5060 || 22000002 | sip:22000002 at 192.168.1.6:5060 | sip:xxx.xxx.xxx.xxx:2557 |+----------+-------------------------------+--------------------------+The number that takes up port 5060 on the NAT server,which is 22000001 can call the other UA but not the other way round.22000002 can only receive calls.Please help me,KM
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