<body>
<form id="form1" runat="server">
<div>
</div>
<asp:scriptmanager ID="Scriptmanager1" runat="server"></asp:scriptmanager>
<rsweb:ReportViewer ID="ReportViewer1" runat="server">
</rsweb:ReportViewer>
</form>
</body>
</html>
try this and add ur click on the vviewer tab to seletc ur report