Radwindow issue firing OnClientClose

[Al]

I have a RadGrid in a Jobs page which, when in edit mode, opens a JobCost.ascx WebUserControl. From the .ascx WebUserControl I open a popup page to search for OrderNumbers using RadOpen.

 function openWinOrder()
        {
             var oWnd = radopen("SalesOrders.aspx", "WinOpenSalesOrder", 1000, 500, 00, 50);
        }


         function OnClientCloseOrder() {
             var arg = args.get_argument();
             if (arg) {
                 var mSalesOrderNumber = arg.mSalesOrderNumber;
                 var pSalesOrderNumber = $find("<%= txtOrderNumber.ClientID %>");
                 pSalesOrderNumber.set_value("Hello");
             }
         }

<telerik:RadWindowManager ID="RadWindowManager2" ShowContentDuringLoad="false" VisibleStatusbar="false"
        ReloadOnShow="true" runat="server" Skin="WebBlue" EnableShadow="true">
        <Windows>
            <telerik:RadWindow ID="WinOpenSalesOrder" runat="server" Behaviors="Close" OnClientClose="OnClientCloseOrder"
                NavigateUrl="SalesOrders.aspx">
            </telerik:RadWindow>
        </Windows>
    </telerik:RadWindowManager>

Am I doing something daft or is there an issue du to there ending up with more than one RadWindowManager

[Al]

It was as suspected related to having two RadWindowManager first produced by the main page and the second in the ascx webUserControl.  

I found the solution in a different post

var manager = $find("<%= RadWindowManager2.ClientID %>");
manager.open(myUrl, "RadWindow2");

[Rumen]

I am glad that you found a solution and resolved the issue! Just for reference the solution was provided by Mr. Tunev in the following forum post: https://www.telerik.com/forums/how-to-use-multiple-radwindowmanager-in-one-page#1300195.