Help Search Function not working when using masterpage

Hi,
It's working fine when for Search Function When I use:
Customer.aspx
******************************************************************************************
<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
    Namespace="System.Web.UI" TagPrefix="asp" %>





   


   

   

   
           
               
           
           
               
               
           
           
            
                   
                
                
                
                    
                                      AutoGenerateColumns="False" DataKeyNames="Code" DataSourceID="SqlDataSource1" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical">
                    
                        
                                                      SortExpression="Code" />
                        
                        
                        
                        
                        
                    
                    
                    
                    
                    
                    
                    
                
                    
                
                                SelectCommand="SELECT * FROM [Customer] WHERE ([Name] LIKE '%' + @Name + '%')" ConflictDetection="CompareAllValues" DeleteCommand="DELETE FROM [Customer] WHERE [Code] = @original_Code AND [Name] = @original_Name AND [Gender] = @original_Gender AND [City] = @original_City AND [State] = @original_State AND [Type] = @original_Type" InsertCommand="INSERT INTO [Customer] ([Name], [Gender], [City], [State], [Type]) VALUES (@Name, @Gender, @City, @State, @Type)" OldValuesParameterFormatString="original_{0}" UpdateCommand="UPDATE [Customer] SET [Name] = @Name, [Gender] = @Gender, [City] = @City, [State] = @State, [Type] = @Type WHERE [Code] = @original_Code AND [Name] = @original_Name AND [Gender] = @original_Gender AND [City] = @original_City AND [State] = @original_State AND [Type] = @original_Type">
           
               
               
               
               
               
               
           
           
               
               
               
               
               
               
               
               
               
               
               
           
           
               
           
           
               
               
               
               
               
           
            
                
           

Test Customer
Search By Name:

     
   

   

******************************************************************************************
BUT IT DOESN'T WORK when using masterpage
Customer.Master
******************************************************************************************
<%@ Master Language="C#" AutoEventWireup="true" %>



   
   


   

       
           
               
               
           
       
   

   


****************************************************************************

CustomerMP.aspx
****************************************************************************
<%@ Page Language="C#" MasterPageFile="~/Customer.Master" AutoEventWireup="true"%>
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
    Namespace="System.Web.UI" TagPrefix="asp" %>
   
 
 
           
               
           
           
               
               
           
           
            
                   
                
                
                
                    
                                      AutoGenerateColumns="False" DataKeyNames="Code" DataSourceID="SqlDataSource1" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical">
                    
                        
                                                      SortExpression="Code" />
                        
                        
                        
                        
                        
                    
                    
                    
                    
                    
                    
                    
                
                    
                
                                SelectCommand="SELECT * FROM [Customer] WHERE ([Name] LIKE '%' + @Name + '%')" ConflictDetection="CompareAllValues" DeleteCommand="DELETE FROM [Customer] WHERE [Code] = @original_Code AND [Name] = @original_Name AND [Gender] = @original_Gender AND [City] = @original_City AND [State] = @original_State AND [Type] = @original_Type" InsertCommand="INSERT INTO [Customer] ([Name], [Gender], [City], [State], [Type]) VALUES (@Name, @Gender, @City, @State, @Type)" OldValuesParameterFormatString="original_{0}" UpdateCommand="UPDATE [Customer] SET [Name] = @Name, [Gender] = @Gender, [City] = @City, [State] = @State, [Type] = @Type WHERE [Code] = @original_Code AND [Name] = @original_Name AND [Gender] = @original_Gender AND [City] = @original_City AND [State] = @original_State AND [Type] = @original_Type">
           
               
               
               
               
               
               
           
           
               
               
               
               
               
               
               
               
               
               
               
           
           
               
           
           
               
               
               
               
               
           
            
                
           

Test Customer With MasterPage
Search By Name:

   
   
****************************************************************************
I couldn't find the problem why.  Pls HELP. 
Thanks.

Lans