Can you please verify that your query string is entered correctly and that the user name and password are also correct. Also, are you able to play back the live stream that you are attempting to record?
It will work on a Wowza edge, but the stream name will have to be .stream file and be pre-started with the MediaCaster system using MediaCaster type "liverepeater". If you are using the Application.xml /OriginURL and a simple stream name in the player, you have to use .stream file instead, with the whole rtmp url. For example a file named origin.stream in the /content folder with contents: "rtmp://[wowza-origin-server]/liveorigin/myStream". Then use origin.stream as the streamname.