Version Kamailio v4.0 + Siremis installed on Debian Wheezy via apt-get install

I want to use Kamailio as a proxy edge register to our network.

I have installed Kamailio and freeswitch.

I can register on Kamailio but I can’t route a call from my sip client from Kamailio to freeswitch and out to PSTN

Sip client ---- Kamailio-----freeswitch-------SS7 ISDN SIP Gateway --- Carriers

If I register direct on Freeswitch I can route out to PSTN but I don’t understand Kamailio routing.

Can someone let me how I route say from SIP client registered on Kamailio to prefix 01% which goes out to Freeswitch

Many Thanks

Tony