Doesnt work with Airport Extreme.

Camera- Dlink 5029L.
Update July 4th 2016:
Upgraded my router to Apple Airport Extreme. App detects the camera and shows the screen capture but doesnt work when I try to open it. Gets stuck on loading. Tried several things but the issue still exists.
Update July 24th 2015 :
I was able to enable port forward which made it work externally too. GREAT!!
How should one add my camera if they are externally located? I setup the ddns and I can access using that through the browser but doesnt work when I try to manually add the camera. Basically I want to add the camera even if I am externally located so that my remote family can check out the camera too.

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Found the camera and I was using it in seconds. Doesnt work on LTE. Showed some message about uPNP for external use. Have to see what that is. Once that works, I will easily give this a 5star. Much reliable than the official dlink lite app. Thank you OWLR!

coolkams about DLink IP Camera Viewer by OWLR, v0.9.14