Hello there,
First, can you confirm you are entering the publisher name and password correctly when ModuleRTMPAuthenticate is enabled?
Second, you could try adding the name of the encoder to the Flash Version String field.
If you are not sure what to put here, you can find it by looking for a line like this in the logs:
INFO server comment 2011-01-14 22:16:23 - - - - - 2.894 - - - - - - - - Flashver: Wirecast/FM 1.0 (compatible; FMSc/1.0)
You can edit this field at:
Engine Manager > App name > Incoming Security > Flash Version String
And here is the guide for further reference:
How to configure security using Wowza Streaming Engine Manager
Lastly, are you seeing any indication of the issue output to the Wowza logs? You can start Wowza in stand-alone mode [install-dir]/bin/startup.bat|startup.sh and view the output in the console. Or you can find the logs at [install-dir]/logs
Thank you,
Salvadore