D-Link DCS-2100 Connects, then drops after .5 seconds then ‘unable to connect’

Every time I launch the iCamviewer on my iPhone 4S and load my only camera (DLink DCS2100), the camera image comes up pretty much immediately, then goes away less than a second later, and the 'unable to connect to your camera…' message comes up.

There's another certain _ _ _ _ scope software that I use that connects to the camera fine via Firefox and the application on my Mac Pro desktop, so I know the port forwarding and such are correct. I even tried opening ports 1-9000, and putting the camera in the DMZ of my linksys router… same iCamviewer behavior across the board.

I think it's weird that the image appears then goes away. So it is clearly connecting initially, but can't hang on.