How are you starting the stream?
Are you using Stream Manager?
For the camera.stream file, you should just have the IP address of the camera:
What type of IP camera are you using? As this may change what the URL format in the camera.stream file.
Also make sure there is not a .txt extension appended to the file name. This file should be placed in the [wowza-install-dir]/content folder
Try changing these settings back to default to test:(these settings are the default)