Hi,
i've a problem using GeoExt.data.WMSCapabilitiesStore with a wms (GeoServer).

When i try to request the capabilities-document from the server firebug tells me 
"Failed to load source for: http://localhost:8080/geoserver/ows?service=wms&version=1.1.1&request=GetCapabilities"

When i put the request in the browser-url, i get an "application/vnd.ogc.wms_xml"-document, which seems right.
When i save this document to disc and use it with the WMSCapabilitiesStore, it works fine.

How can i get the capabilities from my geoserver to my application without saving the capabilities-document to disk?

the source:
Ext.onReady(function() {
        store = new GeoExt.data.WMSCapabilitiesStore({
            url: "http://localhost:8080/geoserver/ows?service=wms&version=1.1.1&request=GetCapabilities",
        });
        store.load();
        [...some other code...]
});