It sounds like you are trying to access a live stream through a VOD application?
Do you have a live stream available? Either an encoder or IP camera sending a stream to Wowza?
What is the playback URL you are using? You can test your Wowza installation by navigating to this URL in an iOS device browser:
But to play a live stream, lets say the live stream is called "myStream" you would need to use this URL:
Please take a look at these guides for configuring a live application:
How to set up live streaming using an RTMP-based encoder
How to set up live streaming using an RTSP/RTP-based encoder