[Serusers] Problem with natted X-lite and public gateway

[Carlo]

Hi all, I've a problem beetween X-lite softphone and Cisco Sip Gateways.
Both SER and Cisco Gateways are configured with public ip addresse, 
while the x-lite is behind a nat router.
It seems that the x-lite doesn't take into account the ser ip address in 
SDP connection information field but it sends rtp to the ip of the cisco 
gateway.

Can someone help me ? How can I try to solve the problem?

Thanks
Carlo