Object Required on Line 119

I've installed FCKeditor in two sites at two different Win2003 servers.

In the first one it works great, but in the second one I cannot make the file manager to work. Whenever I press the "browse" button on the "insert new image" dialog, I get an "object required at line 119" error.

Line 119 of editor/filemanager/browser/default/frmresourceslist.html is as follows:

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// Get the current folder path.
var oNode = fckXml.SelectSingleNode( 'Connector/CurrentFolder' ) ;
119 -> var sCurrentFolderPath = oNode.attributes.getNamedItem('path').value ;
var sCurrentFolderUrl = oNode.attributes.getNamedItem('url').value ;
--------------------------------------------

I'm using the ASP connector and I've tried it both on Firefox and IE, but I cannot make it work.

I've searched this forum for an answer, but couldn't find any working solution.