Thanks kenbuja
That worked...I was to focused on trying to specify the depth of those layers instead of looking at the map component itself....I Implemented this with an event on "added" on the graphic layer with this (if others read the post):
private function fLayer_graphicAddHandler():void{
map.reorderLayer("MaCoucheGraphique", map.layers.length);
}
And in the xml:
<esri:GraphicsLayer click="graphic_clickHandlerParks(event)" added="fLayer_graphicAddHandler()" graphicProvider="{SharePoint.result}" id="MaCoucheGraphique"/>
Thanks again!
Steve