Web Forms :: Integration Import Not Working

I have got a master page of a website which picks up the content given by the user and displays it on their side(server) when the user saves it. Basically I give the project in a general format to them and they edit this master page and give the content to their website in whatever way they want. But since few days I have been getting this error When ever the client tries to change the content and save it and refresh it takes them to a error page which says as shown below Error message on resulting template after the import:

Server Error in '/elina' Application. Cannot find ContentPlaceHolder 'plcCol1' in the master page '/elina/Elina.Master', verify content control's ContentPlaceHolderID attribute in the content page. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Web.HttpException: Cannot find ContentPlaceHolder 'plcCol1' in the master page '/elina/Elina.Master', verify content control's ContentPlaceHolderID attribute in the content page.

Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Now the code on the master page is as shown below

using
System;
using
System.Collections.Generic;
using
System.Configuration;
using
System.IO;
using
System.Web;
using
System.Web.Security;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
Exact.CMS.Navigation;
using
Exact.Hospitality.Core.Models;
using
ResortManagement.BusinessLogic;
namespace
{
ResortManagementpublic
partial
class
ElinaMasterPage :
MasterPage
{
{
plcClientMenu.Controls.Add(LoadControl(
plcLogin.Controls.Add(LoadControl(
{
plcBooking.Controls.Add(LoadControl(
}
}
{
IsLive =
{
Analytics =
}
protected
bool IsLive =
true;protected
bool Analytics =
false;protected
void Page_Init(object sender,
EventArgs e)"~/Component/LoggedInMenu.ascx"));"~/Component/LoginBar.ascx"));if
(plcBooking.Controls.Count == 0)"~/Component/BookingShortcut.ascx"));protected
void Page_Load(object sender,
EventArgs e)ConfigurationManager.AppSettings["IsLive"].Equals("1");if
(ConfigurationManager.AppSettings["GoogleAnalytics.Enabled"]
!= null)ConfigurationManager.AppSettings["GoogleAnalytics.Enabled"].Equals("true");NavController
nc = NavControllerHelper.CurrentPage;//SetCalendarLanguage();
mainMenu = nc !=
subMenu = nc !=
{
mainMenuCtrl.MenuItems = mainMenu;
subMenuCtrl.MenuItems = subMenu;
}
((
}
{
NavController[] mainMenu;NavController[] subMenu;null
? ExactSiteMap.Find(nc.Language).GetMenuAtLevel(nc.Id, 0) :ExactSiteMap.Find().GetMenuAtLevel(1,
0);null ?
ExactSiteMap.Find(nc.Language).GetMenuAtLevel(nc.Id, 1) :ExactSiteMap.Find().GetMenuAtLevel(1,
1);if (this.FindControl("PlaceHolderMenu1")
!= null)var mainMenuCtrl =
this.FindControl("PlaceHolderMenu1")
as Exact.UserControl.Menu;var
subMenuCtrl = this.FindControl("PlaceHolderMenu2")
as Exact.UserControl.SubMenu;if
(this.FindControl("litCopyright") !=
null)Literal)this.FindControl("litCopyright")).Text
=String.Format((string)GetGlobalResourceObject("SiteResource",
"FooterCopyright"),DateTime.Today.Year);public
Control TopCornerElementget {
return plcBooking.Controls[0]; }set
{
plcBooking.Controls.Clear();
plcBooking.Controls.AddAt(0,
}
}
{
}
{
language = Request.UserLanguages[0].Split(separator)[0];
value);public
Control LoginElementget {
return plcLogin.Controls[0]; }protected
void SetCalendarLanguage()string baseUrl = Server.MapPath("/");char[]
separator = { '-' };string language;if
(Request.UserLanguages != null)else language =
"en";if (File.Exists(baseUrl
+ "/js/calendar/lang/calendar-" + language +
".js"))ScriptManager.RegisterClientScriptInclude(Page, Page.GetType(),
"calendar-lang","/js/calendar/lang/calendar-" + language +
".js");else
}
}
}
ScriptManager.RegisterClientScriptInclude(Page, Page.GetType(),
"calendar-lang","/js/calendar/lang/calendar-en.js");
The HTML CODE for this page is shown below
<%
@
Master
Language="C#"
AutoEventWireup="true"
CodeBehind="Elina.master.cs"
Inherits="ResortManagement.ElinaMasterPage" %><%@
Register
Assembly="Exact.CMS.Deploy"
TagPrefix="exactCMS"
Namespace="Exact.UserControl" %>
<!
<
<
DOCTYPE
HTML
PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">html
xml:lang="en"
xmlns="http://www.w3.org/1999/xhtml"
lang="en">head>
<meta
http-equiv="Content-Type"
content="text/html; charset=UTF-8">
<link
rel="stylesheet"
type="text/css"
href='/elina/img/styles.css'
media="all">
<link
rel="stylesheet"
type="text/css"
href='/elina/img/styles_screen.css'
media="screen, projection">
<link
rel="stylesheet"
type="text/css"
href='/elina/img/styles_print.css'
media="print">
<link
rel="shortcut icon"
type="image/ico"
href="favicon.ico">
<script
type="text/javascript"
src='/elina/js/date.js'></script>
<script
type="text/javascript"
src='/elina/js/jquery.js'></script>
<script
type="text/javascript"
src='/elina/js/jquery.extensions.js'></script>
<script
type="text/javascript"
src='/elina/js/scripts.js'></script>
<script
type="text/javascript"
src='/elina/js/swfobject.js'></script>
<
<script
type="text/javascript"
src='/elina/js/thickbox.js'></script>style
type="text/css">
.t_main {
width: 980px;
min-height:100%;
}
.t_top {
height: 40px;
width: 980px;
background-image: url(/elina/img/t_top_bg.jpg);
background-repeat: repeat-y;
}
.t_top_logo {
height: 35px;
width: 35px;
position: relative;
float: right;
right: 10px;
top: 2px;
}
t_center {
width: 980px;
}
.t_footer {
height: 70px;
width: 980px;
background-image: url(/elina/img/t_footer_bg.jpg);
background-repeat: repeat-y;
}
.t_center_left {
float: left;
width: 210px;
position: relative;
}
.t_center_right {
float: right;
width: 770px;
position: relative;
}
#box2{
padding-bottom:130px;
width:980px;
min-height:100%;
}
</
</
<
<
<
<
style>head>body>div
class="t_main">div
id="box2">form
id="form1"
runat="server"><asp:ScriptManager
ID="ScriptManager1"
runat="server"></asp:ScriptManager>
<div
class="t_top">
<div
class="t_top_logo"><img
src=''
/></div>
</div>
<div
class="t_center">
<div
class="t_center_left">
<br
/>
<
<
asp:PlaceHolder
ID="plcBooking"
runat="server"/>br
/>
<
</
asp:PlaceHolder
ID="plcLogin"
runat="server"/>div>
<asp:ContentPlaceHolder
ID="plcCol1"
runat="server"/>
</div>
<
</
</
</
asp:PlaceHolder
ID=
"plcClientMenu"
runat="server"/>form>body>html>