Background:  
I am trying to create a RadDock  dynamically on an .aspx Page and further adding a Control(.acsx) in RadDock. The .acsx Control has a RadDatePicker, RadComboBox, asp:ImageButton controls etc in it. The .aspx page also contains a RadComboBox.

Issue:
In that Page, I need to repopulate the RadDock with Control when the RadDock moves from a RadDockZone to other RadDockZone .

I am try create this page with help of example that is published on the telerik site(Dynamically add Raddock)

I am getting some errors when I am trying to do so:

1.Sys.InvalidOperationException: Type Telerik.Web.UI.Orientation has already been registered.

2.Sys.InvalidOperationException: Type Telerik.Web.UI.RadComboBoxEventArgs has already been registered.

3.Sys.InvalidOperationException: Type Telerik.Web.UI.AttributeCollection has already been registered.

4.(missing : after property id)  Sys.Application.add_init(function() {
    $create(Telerik.Web.UI.RadCalendar, {"_DayRenderChangedDays":{},"_FormatInfoArray":[["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"],["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],["January","February","March","April","May","June","July","August","September","October","November","December",],["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec",],"dddd, MMMM dd, yyyy h:mm:ss tt","dddd, MMMM dd, yyyy","h:mm:ss tt","MMMM dd","ddd, dd MMM yyyy HH\':\'mm\':\'ss \'GMT\'","M/d/yyyy","h:mm tt","yyyy\'-\'MM\'-\'dd\'T\'HH\':\'mm\':\'ss","yyyy\'-\'MM\'-\'dd HH\':\'mm\':\'ss\'Z\'","MMMM, yyyy","AM","PM","/",":",0],"_ViewRepeatableDays":{},"_ViewsHash":{ctl00_MainCntrl_RadDock23512acf-a922-4af4-b1d3-871a17563fb3_C_widget_gridCalenderEventOrder_ctl00_ctl06_RadDatetxtFirstTextBox_calendar_Top : [[2009,7,1], 1]},"_calendarWeekRule":0,"_culture":"en-US","_enableViewSelector":false,"_firstDayOfWeek":7,"_postBackCall":"__doPostBack(\u0027ctl00$MainCntrl$RadDock23512acf-a922-4af4-b1d3-871a17563fb3$C$widget$gridCalenderEventOrder$ctl00$ctl06$RadDatetxtFirstTextBox$calendar\u0027,\u0027@@\u0027)","clientStateFieldID":"ctl00_MainCntrl_RadDock23512acf-a922-4af4-b1d3-871a17563fb3_C_widget_gridCalenderEventOrder_ctl00_ctl06_RadDatetxtFirstTextBox_calendar_ClientState","enabled":true,"monthYearNavigationSettings":["Today","OK","Cancel","Date is out of range.","False"],"skin":"Office2007","specialDaysArray":[],"stylesHash":{DayStyle: ["", ""],CalendarTableStyle: ["", "rcMainTable"],OtherMonthDayStyle: ["", "rcOtherMonth"],TitleStyle: ["", ""],SelectedDayStyle: ["", "rcSelected"],SelectorStyle: ["", ""],DisabledDayStyle: ["", "rcDisabled"],OutOfRangeDayStyle: ["", "rcOutOfRange"],WeekendDayStyle: ["", "rcWeekend"],DayOverStyle: ["", "rcHover"],FastNavigationStyle: ["", "RadCalendarMonthView RadCalendarMonthView_Office2007"],ViewSelectorStyle: ["", "rcViewSel"]},"useColumnHeadersAsSelectors":false,"useRowHeadersAsSelectors":false}, null, null, $get("ctl00_MainCntrl_RadDock23512acf-a922-4af4-b1d3-871a17563fb3_C_widget_gridCalenderEventOrder_ctl00_ctl06_RadDatetxtFirstTextBox_calendar"));
});

There is the code I am using to add the control in the RadDock

 Control widget = (Control)LoadControl(TagArr1[1]); //TagArr1[1] Control Url
 WidgetsControl_CalenderComponent widgetControl = (WidgetsControl_CalenderComponent)widget;

 dock.ContentContainer.Controls.Add(widget);
 widgetControl.IsSchoolHomePage = SessionInfo.IsSchoolHome;