Making more than one vector layer clickable in OpenLayers

I'm working on a OpenLayers map that will display multiple KML layers at once. I want to be able to click on a feature from any layer and have a pop-up show me some info. So far I can only click on the most recently added layer. If I want to click on a previously added layer I have to turn off all the layers that were added before. Obviously this is less than ideal. Here's my code so far:

var select = [];
function addLayer(layerId, layerLink, layerColor)
{

    var kmlLayer = new OpenLayers.Layer.Vector("Layer_"+layerId, {
        strategies: [new OpenLayers.Strategy.Fixed()],
        protocol: new OpenLayers.Protocol.HTTP({
            url: layerLink,
            format: new OpenLayers.Format.KML({
        extractStyles: true, 
        extractAttributes: true,
        maxDepth: 2
        })
    })
    });

    kmlLayer.events.on({
        "featureselected": onKMLSelect,
        "featureunselected": onKMLUnselect
    });

    select["Layer_"+layerId] = new OpenLayers.Control.SelectFeature(kmlLayer);
    map.addControl(select["Layer_"+layerId]);
    select["Layer_"+layerId].activate();  

    map.addLayer(kmlLayer);

}
function onKMLPopupClose(evt) {
    for(s in select)
    {
        select[s].unselectAll();
    }
}
function onKMLSelect(event) {
        var feature = event.feature;

    var content = "<h2>"+feature.attributes.name + "</h2>" + feature.attributes.description;
    popup = new OpenLayers.Popup.FramedCloud("chicken", 
                             feature.geometry.getBounds().getCenterLonLat(),
                             new OpenLayers.Size(100,100),
                             content,
                             null, true, onKMLPopupClose);
    feature.popup = popup;
    map.addPopup(popup);
}
function onKMLUnselect(event) {
    var feature = event.feature;
    if(feature.popup) {
        map.removePopup(feature.popup);
        feature.popup.destroy();
        delete feature.popup;
    }
}

Any help w