Does your camera support RTSP/RTP interleaved (RTP over TCP)? If not you need to change the RTPTransportMode value from interleave to udp:
<!-- udp, interleave -->
<!-- Properties defined here will override any properties defined in conf/MediaCasters.xml for any MediaCasters loaded by this application -->
I just found this in the trouble shooting documentation:
Android does not support RTSP/RTP interleaved (RTP over TCP). This means if UDP is unavailable for RTP playback, RTP over TCP will not work as a failover and your stream will not play
Wowza streams RTSP/RTP over UDP checked with WireShark and VLC media player.
(No VLC fallback to TCP, all RTP packets are send via UDP).