[SR-Users] Kamailio IMS Proxy Not responding

Dears, Good day! i was trying to implement IMS platform in separated servers, i used ubuntu server 16.04 LTS, and ng-voice repository (Kamailio 5.1) with the installation wizard and minimum Conf i also choose FHoSS as HSS bind9 as DNS When i tried to register the Proxy-CSCF is not responding to any request, even no timeout, or error massage, and of course the request is not handled to I-CSCF. The client perform 11 tries, and got no respond Previously i had success with the one image IMS vm, and tried it on separated servers (kamailio version 4.2.4) Am i missing something ? how can i start troubleshoot as there is no error massages ? Is it because i'm using ubuntu 16 instead of 14? your help is highly appreciated ! attached is my configuration files Thanks in Advance Amar