FS all sip signals detected! user registered! he/she can call 5000 (demo-ivr) and ... but i have no sound from place #1(even-though call starts and demo-ivr starts) and have sound from another place #2!

#1 NAT Scenario (My Company Network)

FS <> Internet <> NAT <> NAT <> More NAT or Firewall is probable <> SIP Phone

FS <> Internet <> Wimax Router NAT <> SIP Phone

FS logs when being passed dial plans and starts to play IVR for the scenario #1 with no sound at client:
http://pastebin.freeswitch.org/21109

My OS(Fedora) tcpdump logs:
http://pastebin.freeswitch.org/21110

any suggestion?!