Upload Image file using ASP.Net AJAX Modal Popup Extender

Refer

http://asadshahs.blogspot.in/2012/03/how-to-upload-image-in-modal-popup.html

ok I wrote code but when i ran website this error occur

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.  Parser Error Message: Unknown server tag 'asp:toolkitscriptmanager'. Source Error: 

Line 22: 
Line 23:     
Line 24: <asp:toolkitscriptmanager id="ToolkitScriptManager" runat="server"> Line 25:     </asp:toolkitscriptmanager>
Line 26:     <asp:UpdatePanel ID="Upbdt" runat="server">

i add ajax control in my page previouse error be solved but now this error occur

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.  Parser Error Message: Type 'System.Web.UI.WebControls.Button' does not have a public property named 'panel'. Source Error: 

Line 42:             <asp:Button ID="BtnPopup" OnClick="BtnPopup_Click" runat="server" Text="Show Popup">
Line 43:            
Line 44: <asp:panel id="PnPopup" runat="server"> Line 45:                     <asp:fileupload id="FpImg" runat="server">
Line 46:                      <asp:button id="BtnUpload" onclick="BtnUpload_Click" runat="server" text="Upload">

<asp:panel must be <asp:Panel