[Users] WMSCapabilities loading in a tree problem

[Sukuchha Shrestha]

Dear all,

 I want your help in solving this issue of populating WMS capabilities in a Tree 
in GeoEXT.  I want to populate a WMS layers name in a tree.There is an example 
about it in http://api.geoext.org/1.0/examples/wms-tree.html.

var root = new Ext.tree.AsyncTreeNode({
        text: 'GeoServer Demo WMS',
        loader: new GeoExt.tree.WMSCapabilitiesLoader({
            url: 'capabilities.xml',
autoload:true,
            layerOptions: {buffer: 0, singleTile: true, ratio: 1},
            layerParams: {'TRANSPARENT': 'TRUE'},
            // customize the createNode method to add a checkbox to nodes
            createNode: function(attr) {
                attr.checked = attr.leaf ? false : undefined;
                return 
GeoExt.tree.WMSCapabilitiesLoader.prototype.createNode.apply(this, [attr]);
            }
        })
    });

I have a capabilites XML in a local folder. I set the relative path but nothing 
happens? When i see in firebug, it is firing with options without with GET and 
hence no XML is read ! I tried with absoulute path as well for one of the 
website (http://www.lv-bw.de/dv/capabilities.xml) but no avail. 

Even in the examples in geoext.org if i change url of data(wmscap.xml): to 
absoulute URL http://api.geoext.org/1.0/examples/data/wmscap.xml, layers are not 
loaded in the tree. i scramble a bit in the mail list, and saw some people were 
talking about this type of problem and were saying it might be due to some proxy 
stuff. But i still dont have a clear clue, why this is not working?

Any input would be greatly appreciated.

Regards
Sukuchha
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