Master Pages and Content Pages

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ASP.NET

Hi,


I have one Master Page and 2 Content Place Holder in this Page. I have load 2 Iframes in these content Place holder. After that I overright "ContentPlaceRight" in frmRight.aspx and then add one Panel in this contentplaceholder. I want to access this control in my "ContentPlaceLeft" (content page). But it shows an error for "Object reference not to set an object ".Please see the aspx and codebehind below :

<table>
            <tr>
                <td width="30%">
                    <asp:ContentPlaceHolder id="ContentPlaceLeft" runat="server">    
                        <iframe src="Default.aspx" marginwidth="0" marginheight="0" frameborder="No" noresize scrolling="auto" height="100%"
 
                width="100%"  runat="server" target="_top"></iframe>
                    
                </td>
            
               <td width="70%">        
                 <asp:ContentPlaceHolder id="ContentPlaceRight" runat="server">
                      <iframe src="frmRight.aspx" marginwidth="0" marginheight="0" frameborder="No" noresize scrolling="auto" height="100%" width="100%"  runat="server" target="_top"></iframe>        
                                
               </td> 
            </tr>    
    </table>

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Dim contentPage As ContentPlaceHolder = TryCast(Me.Page.Master.FindControl("ContentPlaceRight"), ContentPlaceHolder)

           Dim Panel As Panel = TryCast(contentPage.Parent.FindControl("panelOrg"), Panel)
           Panel.Attributes.Add("style", "display:block")