[Serusers] SER Dispatcher Module

Hi Here is my setup Users ----> SER ----> Asterisk ----> PSTN works fine. when ever user dial able to hear balance message and calls goes fine. Just now I replaced my setup to use Dispatcher module Users -----> SER (Dispatcher module) ----------> Asterisk Boxes -----> PSTN when user makes calls not able to hear balance message all the times but able to make PSTN calls ? In my config I just changed replace IP of my asterisk box with dispatcher config: Old config: strip(1); rewritehostpost("x.x.x.x:5060"); route(4); NAT Detet. New conifg: strip(1); ds_select_dst("1", "0"); forward(uri:host, uri:port); route(4); dispatcher file: 1 sip:x.x.x.x:5060 1 sip.y.y.y.y:5060 Need help on above. Thanks, Arun