Oh, thanks for you answer.
I didn't realize the paths were relative to the flowplayer install.
So i did what you told me, put everything in the same folder,
My first item in my playlist (an image) now show up, but my second item (the video) get me a 201 error, unable to load stream or clip file.
Here is my code, maybe you'll have a clue !, anyway thanks a lot...
<object width="320" height="250" data="flowplayer-free-3.1.2.swf" type="application/x-shockwave-flash"><param name="movie" value="flowplayer-free-3.1.2.swf" /><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="flashvars" value='config={"plugins":{"controls":{"url":"flowplayer.controls-custom.swf","autoHide":"fullscreen","hideDelay":1000,"opacity":1,"time":true,"mute":true,"tooltips":{"buttons":true,"play":"LECTURE","pause":"PAUSE","fullscreen":"PLEIN ECRAN","fullscreenExit":"SORTIR DU PLEIN ECRAN","mute":"COUPER LE SON","unmute":"ACTIVER LE SON"}}},"playlist":[{"url":"test.jpeg","scaling":"scale"},{"url":"toto.flv","autoPlay":false,"bufferLength":5,"scaling":"fit"}],"play":{"replayLabel":"Revoir"},"clip":{}}' /></object>