[Users] Legend Panel Images

[neomi mustain]

Hi,

Basic question here?!?  I've added several layers to my map. And Ive
attempted to create a simple Legend Panel. The problem: If I load the map
with the layers visible, everything works fine. But If I load the map with
the layers turned off, when turning on a layer, the legend image does not
display. (The layer name appears, but no icon image).  Any Hints?

Thank You!!
Neomi

Relevant parts of code:

// add overlay
var fixedLayer3 =    new OpenLayers.Layer.WMS("Photos",
                    wmsurl, {
                        layers: "ex:photo",
                        transparent: true,
                         format: 'image/png'
                    }, {
                        //tileSize: new OpenLayers.Size(256,256),
                        singleTile: true, ratio: 1,
                        isBaseLayer: false,
                        displayInLayerSwitcher: true,
                        visibility: false
                    });
    map.addLayer(fixedLayer3);

//add legend panel
    var legendPanel = new GeoExt.LegendPanel({
        title: 'Legend',
        autoScroll: true,
        bodyStyle: 'padding:5px',
        width: 150,
        region: 'west'
    });
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