Voxbeam Inbound route issue

Can anyone please help me configure my inbound route with voxbeam. I called the company and they said that my system does not accept the invite from them. I spent hours trying to figure it out. I learned a lot. Both trunks do not register but the outbound trunk sends audio and I can make calls. However my DID is not working for me. Voxbeam have configuration instruction for Asterisk but not for freepbx. I am running Freepbx on 64 bit machine. Please help