web开发1-fckeditor部署报错:The server didn't reply with a proper XML data.

FCKXml.prototype.LoadUrl = function( urlToCall, asyncFunctionPointer )
{
    var oFCKXml = this ;

    var bAsync = ( typeof(asyncFunctionPointer) == 'function' ) ;

    var oXmlHttp = this.GetHttpRequest() ;

    oXmlHttp.open( "GET", urlToCall, bAsync ) ;

    if ( bAsync )
    {
        oXmlHttp.onreadystatechange = function()
        {
            if ( oXmlHttp.readyState == 4 )
            {
                var oXml ;
                try
                {
                    // this is the same test for an FF2 bug as in fckxml_gecko.js
                    // but we've moved the responseXML assignment into the try{}
                    // so we don't even have to check the return status codes.
                    var test = oXmlHttp.responseXML.firstChild ;
                    oXml = oXmlHttp.responseXML ;
                }
                catch ( e )
                {
                    try
                    {
                        oXml = (new DOMParser()).parseFromString( oXmlHttp.responseText, 'text/xml' ) ;
                    }
                    catch ( e ) {}
                }

                if ( !oXml || !oXml.firstChild || oXml.firstChild.nodeName == 'parsererror' )
                {
                    alert( 'The server didn\'t send back a proper XML response. Please contact your system administrator.\n\n' +
                            'XML request error: ' + oXmlHttp.statusText + ' (' + oXmlHttp.status + ')\n\n' +
                            'Requested URL:\n' + urlToCall + '\n\n' +
                            'Response text:\n' + oXmlHttp.responseText ) ;
                    return ;
                }

                oFCKXml.DOMDocument = oXml ;
                asyncFunctionPointer( oFCKXml ) ;
            }
        }
    }

    oXmlHttp.send( null ) ;

    if ( ! bAsync )
    {
        if ( oXmlHttp.status == 200 || oXmlHttp.status == 304 )
            this.DOMDocument = oXmlHttp.responseXML ;
        else
        {
            alert( 'XML request error: ' + oXmlHttp.statusText + ' (' + oXmlHttp.status + ')' ) ;
        }
    }
}