[Tilecache] GeoServer + TileCahe + WMS + OpenLayer = Doesnt work

[Xiaoyu Guan]

Dear list:

I have successfully setup GeoServer1.6 (Apache Tomcat) + Tilecache(Apache2.2
+ mod_python) + OpenLayer + WMS
I have already test my Geoserver and tilecache , both of them are work. I
used the default examples of Geoserver. However, when I setup my own data
layers for tilecache. it doesnt work.
For example,
I have WMS link like this:
http://127.0.0.1:2008/geoserver/wms?bbox=-77498.10277191945,252450.97991880335,343091.0787104775,680814.505391243&styles=&Format=application/openlayers&request=GetMap&version=1.1.1&layers=topp:Mydatalayer&width=590&height=550&srs=EPSG:28992

and I setup tilecache like this in .cfg file

[topp]
type=WMSLayerw
layers=topp:Mydatalayer
url=http://127.0.0.1:2008/geoserver/wms
extension=png
srs=EPSG:28992

and my OpenLayer script like this

        var lon = 7.37;
        var lat = 52.1;
        var zoom = 10;
        var map, layer;

        function init(){
            OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
            map = new OpenLayers.Map( 'map' );
            layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
                    "/tilecache/tilecache.py", {layers: 'topp'} );
            map.addLayer(layer);

            map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
            map.addControl(new OpenLayers.Control.MousePosition());

            map.addControl( new OpenLayers.Control.LayerSwitcher() );
        }

the result just show pink images, I dont why this happened. I was try to
setup more parameters. but I did not successed.
Is there anybody have idea about this situations? Thanks in advance

All the best

Xiaoyu

-- 
Xiaoyu Guan (Sam)
Geo-information Science
Wageningen UR
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