Control 'LeftNav1_lnkCore' of type 'LinkButton' must be placed inside a form tag with
 

Hi All,
I have an application that i m developing in VS2003 using asp.net and c#
in the left navigation page I need to add the functionality to open and close a panel in the left nav.
here is my code:
---->

<%@ Control Language="c#" AutoEventWireup="false" Codebehind="LeftNav.ascx.cs" Inherits="CE.userControls.LeftNav" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>

<td class="leftcolumn" valign="top">

<div id="snav">

                <div class="subnav">

                        <ul class='navlink'>

                                <li class='navlink3'>

                                <asp:LinkButton ID="lnkCore" Runat="server"  OnClick="lnkCore_Click" CausesValidation="False" > CCR

                                </asp:LinkButton>        </li>

                        </ul>

                </div>

                

        

        <asp:Panel ID="pnlCl"  Runat=server Visible="False">

        <%

        Response.Write ("<div class='subnav'><ul class='navlink'><li class='navlink'");

        int i=0;

                //for (int i=0;i<arrBlock.Count;i++)

                //{

                        string gyr = "0";

                        if (Convert.ToInt32(HttpContext.Current.Session["sesgyr"]) > 0)

                        {gyr = HttpContext.Current.Session["sesgyr"].ToString().Trim();}

                        //Response.Write ("<li class='navlink'>");

                        //if (bcode==(i+1)) {Response.Write ("<img src='/CE/images/arrow.down.png'>");}

                        //else {Response.Write ("<img src='/CE/images/arrow.right.png'>");}

                        //Response.Write ("&nbsp;<a href='/CE/default.aspx?b="+(i+1).ToString().Trim()+"'>"+arrBlock[i]+"</a></li>");

                        //if (bcode==(i+1))

                        //{

                                string ugr = HttpContext.Current.Session["sesusergroup"].ToString().Trim();

                                Response.Write ("<div class='subnav'><ul class='navlink'>");

                                for (int j=0;j<arrCoreBlock.Count;j++)

                                {

                                        Response.Write ("<li class='navlink'><img src='/CE/images/arrow.right.png'>&nbsp;<font color=#00646E>"+arrCoreBlock[j]+"</font></li>");

                                        Response.Write ("<table><tr>");

                                        if (ugr!="CLINBLOCK1CCF" && ugr!="CLINBLOCK1MHMC" && ugr!="CLINBLOCK2CCF" && ugr!="CLINBLOCK2MHMC")

                                        {Response.Write ("<td bgcolor=#b0e0e6 border=1 bordercolor=#000000><a href='/CE/Components/blockCore.aspx?b=0&k="+(j+1).ToString().Trim()+"&h=1&y="+gyr+"'><font color=#00646E>UH/VA</font></a></td>");}

                                        if (ugr!="CLINBLOCK1CCF" && ugr!="CLINBLOCK1UH" && ugr!="CLINBLOCK2CCF" && ugr!="CLINBLOCK2UH")

                                        {Response.Write ("<td bgcolor=#f4a460 border=1 bordercolor=#000000><a href='/CE/Components/blockCore.aspx?b=0&k="+(j+1).ToString().Trim()+"&h=2&y="+gyr+"'><font color=#00646E>MHMC</font></a></td>");}

                                        if (ugr!="CLINBLOCK1UH" && ugr!="CLINBLOCK1MHMC" && ugr!="CLINBLOCK2UH" && ugr!="CLINBLOCK2MHMC")

                                        Response.Write ("<td bgcolor=#adff2f border=1 bordercolor=#000000><a href='/CE/Components/blockCore.aspx?b=0&k="+(j+1).ToString().Trim()+"&h=3&y="+gyr+"'><font color=#00646E>CCF</font></a></td>");

                                        Response.Write ("</tr></table>");

                                }

                                Response.Write ("</ul></div>");

                        //}

                //}

                Response.Write ("</ul></div>");

                %>

                </asp:Panel>

                

        <%

                        Response.Write ("<hr>&nbsp;<img src='/CE/images/arrow.right.png'>");

                        Response.Write ("&nbsp;<a href='/CE/components/cgTime.aspx'>Timeliness</a>");

                                %>

                <br class="header3">

        

        </div>

                        

</td>

<td id="tdMain">

        <div class="paddedwrapper1"></div>

-------<
When I click on the link button lnkCore, i want to expand (i.e make the panel pnlCL visible.)
But I get the following error message that "Control 'LeftNav1_lnkCore' of type 'LinkButton' must be placed inside a form tag with runat="server""
i have done similar thing in my other application, and I didnt face any problem, What could the problem be?
Please help me.. i have been at this since morning!!!!!
Thanks in advance

Re: Control 'LeftNav1_lnkCore' of type 'LinkButton' must be placed inside a form tag with
 

Every web controls with runat="server" attribute must be places inside <form runat="server" id="someID"> </form> tags.
If you use visual studio express editions or visual studio.net, you wont make such mistakes.