Unable to play JW player with multiple bit rates on Android

Question

I have a video file in 720P, 1080P and 480P.
I use this code for JW Player on Android to play a video that has multiple bit rates -

PlaylistItem pl = new PlaylistItem.Builder()
                .file(default_media_url)
                .title(title)
                .sources(list_of_media_source)
                .description("some description")
                .build();
mJwPlayer.load(pl);
mJwPlayer.play();

The problem is that its not even playing it.

Does JW player on Android doesn't support multiple bit rates or am I doing something wrong ?