web forms not displaying form controls in running mode

Dear Sir,

 

I have issue in my asp.net project. kindly go through and let me know the cause.

 

The project having master page and child forms

 

see the screenshot below one of my child form

 

 

and in running mode, those controls are not visible.

 

In MasterPage. Master, I given ajax reference like this

 

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

and also added scriptManager like this:-

 

 

This is the entire html code for the above child form:-

 

<%@ Page Title="" Language="C#" MasterPageFile="~/Master/MasterPage.master" AutoEventWireup="true" CodeFile="wfrmAllocationDownload.aspx.cs" Inherits="WebForms_wfrmAllocationDownload" %>