Windows Media Services server streaming to JWPlayer over RTSP, error "no playable sources found"

Question

So I have a Windows Media Services server that acts as our 'primary' distribution method for streaming live video content. I recently took note that there are RTSP and HTTP options in WMS, and am exploring utilizing that.

Right now, I am using JWPlayer, and coming back with 'no playable sources found'.

I've ensured that I am using the IP that WMS is bound to, and the current/native RTSP and HTTP ports ( 554 and 80 ), And that the plugin is enabled at the server level.

My question at this point May be as simple as 'What is the expected URL scheme/syntax for a Live stream from WMS over RTSP or HTTP'; but may be a bigger question - like 'is my JWPlayer set properly, or will it even support RTSP or HTTP from WMS'.

I am aware that JWPlayer doesn't support MMS, but RTSP and HTTP are not MMS.

Any thoughts would be marvelous.

jwplayer.key = 'KEY';
jwplayer('JWPlayer').setup({
    image: '',
    height: '480px',
    width: '640px',
    skin: 'stormtrooper',
    autostart: '',
    provider: 'rtsp',
    playlist: 
    [{
        sources: 
        [
            { file: 'rtsp://IP:554/LIVEPUBLISHINGPOINT' },
            { file: 'http://IP:80/LIVEPUBLISHINGPOINT' }
        ]
    }]
});

For the record, I'm using the cloud hosted JWPlayer.

Similarly, I can confirm that data is coming across that publishing point in MMS protocol, with roughly the same variables.

RTSP and HTTP over WMS are referenced here.