Help Registering to an Allworx PBX Trunk

At work we have an Allworx Sip 2.0 compliant PBX. This is really nice and allows us to all have softphones in addition to regular phones. I assume I should be able to register my softphone extension to my PBX In A Flash so that I can answer calls on my home system. I have successfully been able to register the trunk and I can even call it. However, I get no audio either direction. I wish I knew more about sip trunk settings. Any help would be appreciated. In my x-lite softphone I have to put in a stun server: stun.xten.com. Would I need to configure the stun server somewhere in my trunk? Here are my settings that register the trunk but I don’t get in audio:

Outgoing Settings:

Peer Details:

disallow=all
allow=ulaw&alaw
canreinvite=no
context=from-pstn
host=..**
secret=*********
insecure=port,invite
type=friend
username=******

Incoming Settings:

User Details:

disallow=all
allow=ulaw&alaw
canreinvite=no
context=from-pstn
host=..**
secret=*********
insecure=port,invite
type=friend
username=******