JwPlayer and WowzaServer 2.2.3

JW Player — Apr 17, 2014 12:16PM EDT

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Hello

I use old WowzaServer 2.2.3

I was using Jwplayer 6.0.2813
I have the following code :
<script type="text/javascript">
jwplayer("myElement").setup({
file: "rtmp://<myIP>/streamingvideo/<MyMovie.mp4>",
//skin: "skin2/skins/six/six.xml",
height: '100%',
width: '100%'
});

=> everything works fine

I try to use caption (subtitles) function , It doesn't worked. So I upgrade to jwplayer 6.8.4616
I changemy code like documentation : http://www.longtailvideo.com/support/jw-player/28854/using-rtmp-streaming
So I write this code :

jwplayer("myElement").setup({
playlist: [{
sources: [{
file: "rtmp://<myServerIP>/streamingvideo/mp4:<MyMovie.mp4>"
}]
}],
height: 640,
primary: "flash",
width: 480

});;


I try without mp4 parameter
I have always the error message on the player :
PlayList could not be loaded:File not Found

I think that the primary parameter is ignored

What is my mistake ?

Please help me

Thanks for your answer

Regards