Index: trunk/kernel/admin_templates/incs/tree.js
===================================================================
diff -u -r5062 -r5063
--- trunk/kernel/admin_templates/incs/tree.js	(.../tree.js)	(revision 5062)
+++ trunk/kernel/admin_templates/incs/tree.js	(.../tree.js)	(revision 5063)
@@ -326,8 +326,8 @@
 TreeFolder.prototype.folderClick = function(img)
 {
 	if (this.LateLoadURL && !this.Loaded) {
-		Request.contentType = 'text/xml';
-		Request.makeRequest(this.LateLoadURL, false, '', this.successCallback, this.errorCallback, this);
+		Request.headers['Content-type'] = 'text/xml';
+		Request.makeRequest(this.LateLoadURL, false, '', this.successCallback, this.errorCallback, '', this);
 	}
 
 	if (this.Expanded) {
@@ -338,15 +338,15 @@
 	}
 }
 
-TreeFolder.prototype.successCallback = function ($request, $object) {
+TreeFolder.prototype.successCallback = function ($request, $params, $object) {
 	$object.ProcessXMLNode($request.responseXML);
 	$object.Loaded = true;
 	$object.Render();
 	$object.locateTopItem().updateLastNodes();
 	$object.expand();
 }
 
-TreeFolder.prototype.errorCallback = function($request, $params) {
+TreeFolder.prototype.errorCallback = function($request, $params, $object) {
 	alert('AJAX ERROR: ' + Request.getErrorHtml($request));
 }