setup Panasonic voip protocol over mikrotik pptp in 2 place.

hi
I Have 2 mik router and i linked that with pptp vpn. at place 1, i have panasonic pbx (NS500) voip support and at place 2, i have a panasonic voip phone.
in calling with voip phone at place 2, no sound recieved from place 1, but in place 1 hears my sound.

Place 1:
PBX IP: 192.168.0.10


Place 2:
IP Phone IP: 192.168.5.121

in 2 mikrotik i add this nat:
;;; PBX Server Port
chain=dstnat action=dst-nat to-addresses=192.168.0.10 to-ports=9300
protocol=udp dst-port=9300 log=no log-prefix=“”

;;; PBX Server Port
chain=dstnat action=dst-nat to-addresses=192.168.0.10 to-ports=9301
protocol=udp dst-port=9301 log=no log-prefix=“”

;;; PBX Server Port
chain=dstnat action=dst-nat to-addresses=192.168.0.10 to-ports=2727
protocol=udp dst-port=2727 log=no log-prefix=“”

;;; PBX Server Port
chain=dstnat action=dst-nat to-addresses=192.168.0.10 to-ports=8000
protocol=udp dst-port=8000 log=no log-prefix=“”

;;; PBX Server Port
chain=dstnat action=dst-nat to-addresses=192.168.0.10 to-ports=12000
protocol=udp dst-port=12000 log=no log-prefix=“”


Plz help Me?