I'm really struggling to get Video call working trough internet.

In local network Video Call is working between SMT-i5243 and Samsung Softphone as well as between 2 SoftPhones or 2 IP phones. It's working with MGI16 card (v1.25) as well as OAS card (v2.0 or 2.03). As soon as I enable MPS feature it's NOT WORKING.

Trough internet I've opened p.9002, but with MPS dissabled I can't see other party video. Voice is OK, my camera picture is shown.

With MPS enabled even my own picture is not showing. I have opened MPS and MPG ports (40000 and 45000)

Please help