Re-streaming is pull, which is what you are doing when you start a stream from an IP camera in StreamManager. Pull means Wowza doesn't know about the stream until you tell it where it is, an IP camera's rtsp url for example. The opposite of pull is push, where the live encoder knows the IP address of the Wowza server and an application name, then pushes a stream to Wowza, which shows a publish event in the logs as soon as it starts.
The problem you are having is connecting to the camera.
Follow this guide carefully, there are several trouble-shooting steps and Property settings that might help:
If you can't get it working, restart Wowza, run through test trying to start the stream and play it back, then zip up the conf folder and current access and error logs and send them to