Hi Luis,
In the aspx:
<head runat="server">
</head>
<body>
<form id="Form1" runat="server">
<atlas:ScriptManager ID="scriptManager" EnablePartialRendering="true" runat="server" />
<atlas:UpdatePanel ID="UpdatePanel2" runat="server" Mode="Always">
<ContentTemplate>
<asp:placeholder id="phContent" runat="server"></asp:placeholder><br />
</ContentTemplate>
</atlas:UpdatePanel>
</form>
</body>
</html>
In
the CodeBehind: