ViciDial with 2 Nic Cards, drop calls

Hi!
I have a fresh installation Vicidial, My server has 2 Nic Cards, one for network and another for SIP trunk provider. My problem is when I have the gateway for network the calls drop but when I change it works
I have a fresh installation Vicidial, My server has 2 Nic Cards, one for network and another for SIP trunk provider. My problem is when I have the gateway for network the calls drop but when I change it works