ขอความช่วยเหลือครับ พอดีเอาไฟล์ลง SERVER คนใช้ส่วนมากไม่ได้ Logout คืปิด windows ไปเฉยๆๆๆ

Public Function LOGOUT(ByRef form As Object, ByVal u_id As String) As Boolean

            If nDBCON.DB_Connect(intranet_Web.s_Server, intranet_Web.s_User, intranet_Web.s_Pass, intranet_Web.s_ASYDB) <> "PASS" Then
                ''''MsgBox("Don't Connect to Data Base", MsgBoxStyle.OkOnly, "Connection Error")
                 form.Session.clear ()
                form.Session.Contents.Remove("UserId")
                form.Session.Contents.Remove("Name")
                form.Session.Contents.Remove("Lname")
                form.Session.Contents.Remove("Email")
                Return False
                nDBCON.DisConnect_rtn()
                Exit Function
            End If

        Protected Sub cmdexit_click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles cmdexit.Click

            ' Take some action based on the response.

            'MsgBox("YES, continue!!", , Title)
            'Call LOGOUT(Me, Session("UserId"))
            Dim dmStrScript As String
            Session.Clear()
            Session.Contents.Remove("UserId")
            Session.Contents.Remove("Name")
            Session.Contents.Remove("Lname")
            Session.Contents.Remove("Email")

          
            Response.redirect(MMMM.aspx)



        End Sub

<?xml version="1.0"?>
<!-- 
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
    \Windows\Microsoft.Net\Framework\v2.x\Config 
-->
<configuration>
	<appSettings/>
	<connectionStrings>
  <add name="INTCONN" connectionString="Server=000000;Database=000000;User ID=000000;Password=000000;"
   providerName="System.Data.SqlClient" />
  <add name="INTRANETConnectionString" connectionString="Data Source=000000;Initial Catalog=000000;Persist Security Info=True;User ID=intranet;Password=int1685"
   providerName="System.Data.SqlClient" />
  <add name="INTRANETConnectionString1" connectionString="Data Source=000000;Initial Catalog=INTRANET;Persist Security Info=True;User ID=000000;Password=000000"
   providerName="System.Data.SqlClient" />
 </connectionStrings>
	<system.web>
		<!-- 
		    <customErrors mode="Off"/>
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
        -->
		<compilation debug="true">
			<assemblies>
				<add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
				<add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/></assemblies>

     
      </compilation>
    <pages>
			<namespaces>
				<clear/>
				<add namespace="System"/>
				<add namespace="System.Collections"/>
				<add namespace="System.Collections.Specialized"/>
				<add namespace="System.Configuration"/>
				<add namespace="System.Text"/>
				<add namespace="System.Text.RegularExpressions"/>
				<add namespace="System.Web"/>
				<add namespace="System.Web.Caching"/>
				<add namespace="System.Web.SessionState"/>
				<add namespace="System.Web.Security"/>
				<add namespace="System.Web.Profile"/>
				<add namespace="System.Web.UI"/>
				<add namespace="System.Web.UI.WebControls"/>
				<add namespace="System.Web.UI.WebControls.WebParts"/>
				<add namespace="System.Web.UI.HtmlControls"/>
			</namespaces>
		</pages>

    
		<!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
		<!--  	<authentication mode="Windows"/> -->
		<!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
		<!-- <sessionState .................    timeout="90" />  -->

	</system.web>
</configuration>