asp:LoginName is not working when deploy on server

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ASP.NET

ASP.NET4

I have a web application. asp:LoginName control is used in it.

It is working fine locally.

but, when i deploy it on the server the control is unaccessible in the code behind and through exception
I have installed .Net framework 4.0 and 4.5 on the server as well
but the result is same.

Windows server 2008 R2 is installed on the server

Please guide.

<asp:LoginView ID="LoginView1" runat="server">
   <LoggedInTemplate>
       <asp:LoginName ID="LoginName1" runat="server" FormatString=" | " />
       <asp:LoginStatus ID="LoginStatus1" runat="server" ForeColor="White" Font-Bold="true"
           OnLoggingOut="LoginStatus1_LoggingOut" />
   </LoggedInTemplate>
</asp:LoginView>

LoginName loginName1 = (LoginName)LoginView1.FindControl("LoginName1");
loginName1.FormatString = "Welcome " + Session["LOGIN_EMP_NAME"] + " | ";