Cisco Routers :: Port Forward On RV180W / Connection Has Timed Out

Until now i used a D-Link router with a DDNS account on dyndns.com. I used the ddns account for accesing the surveillance camera when i wasen't at home. The ports for the cameras are 80 and 83.I have a static ip and when i tiped the IP on broswer i was able to acces the camera with port 80 and when i tiped ip:83 i was able to acces the camera with port 83.Today i got a RV180W router made de configuration (ddns, port forwarding) but now when i type the ip address i can't see the camera, instead the router interface is loading and when i tipe ip:83 i get the message "The connection has timed out".I've tryed diferent things but i can acces the camera only by internal ip (192.168.1.x) but using the DDns address i can't acces the camera.