Item Data Bound

Question

<telerik:GridTemplateColumn AllowFiltering="false" HeaderText="Delete" UniqueName="Delete" HeaderStyle-Width="10%">
                            <ItemTemplate>
                                <asp:ImageButton runat="server" ID="link" CausesValidation="false" ImageUrl="~/App_Themes/Images/Delete.gif"
                                    OnClientClick="return confirm('Are you sure you want to delete?');" CommandArgument='<%#Eval("SubFacility_Id") %>'
                                    CommandName="DeleteRow" />
                            </ItemTemplate>
                        </telerik:GridTemplateColumn>




if (e.Item is GridDataItem)
        {
            objcommonclient = new CMSCommonClient();

            SubFacilities ObjSubFacility = new SubFacilities();
            ObjSubFacility = (SubFacilities)e.Item.DataItem;

            /


            if (hiddenUserAccess.Value == "C" && ObjSubFacility.Status == "Approved")
            {

                GridDataItem dataitem=(GridDataItem)e.Item;
                (dataitem["Delete"].FindControl("link") as ImageButton).Enabled = true;

            }
            else
            {

                GridDataItem dataitem = (GridDataItem)e.Item;
                (dataitem["Delete"].FindControl("link") as ImageButton).Enabled = false;


            }


I want to show delete image button Only the record is approved...,this is the method i followed...,

i'm getting the error Cannot find a cell bound column name "Delete"...,

need a quick reply..., thanks...,