Welcome to Wowza forum. I tried to play your file from mediacache app here with the same result. I downloaded then tried to open your mp4 file with GSpot, which hung for a while, then showed error saying it timed out waiting for codec info.
... Then it showed up after awhile, and I can see that the video is mpeg-4 part 2. You want "mpeg-4 part 10 (avc) h.264", or similar arrangement of that string
Copy the Wowza sample.mp4 to that location and test that. I think it will work, you seem to be set up correctly.
Then take a look at these encoding suggestions. You might be able to use ffmpeg to fix that file, and you can use these examples as starting place or reference for encoding with other software: