dhtmlxGantt File(data/data.xml) not found. But, exists.

Gantt
#1

Hi there, I have problems loadin data.xml file in my aspx page. I have the following aspx page:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Gantt.aspx.cs" Inherits="PPLClienteWeb.gantt.Gantt" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Load from XML</title>
	<meta http-equiv="content-type" content="text/html; charset=utf-8" />
	<link rel="stylesheet" href="../App_Themes/Metro/dhtmlxgantt.css" type="text/css" media="screen" />
    <script type="text/javascript" src="dhtmlxcommon.js"></script>
    <script type="text/javascript" src="dhtmlxgantt.js"></script>
</head>
<body>
    <form id="form1" runat="server">     
        <script type="text/javascript" language="JavaScript">
            /*<![CDATA[*/
            function createChartControl(htmlDiv1) {
                // Initialize Gantt data structures
                // Create Gantt control
                var ganttChartControl = new GanttChart();
                // Setup paths and behavior
                ganttChartControl.setImagePath("imgs/");
                ganttChartControl.showContextMenu(false);
                // Build control on the page
                ganttChartControl.create(htmlDiv1);

                // Load data structure		
                ganttChartControl.loadData("data/data.xml", true, true);

                
            }
            /*]]>*/
</script>
        <div style="width:950px; height:620px; position:relative" id="GanttDiv" runat="server"></div>
        <script type="text/javascript">
            createChartControl('GanttDiv');
        </script>
    </form>
</body>
</html>

data/data.xml is in the same root

Thanks in advance.