Change wan ip to vpn ip

[pijat 0]

Hello admin,

 I have some problem with my dd-wrt(DD-WRT v24-sp2 (01/10/14) big SVN revision 23320). I already add port forward. But if i test using port forward tester, it not see port at my pc(airvpn port=42xx, pc listen port=85). But if i test port to router (port 80), it can see this port. Are this problem cause my wan ip not public ip(10.137.x.x). How to change my wan ip to vpn ip? Thank