How to change url in server? I have completed url change in locally but not in server, when logo(image) click in server then 404 - File or directory not found why?

<asp:HyperLink ID="hlLogo" Target="_blank" runat="server" Font-Underline="false" NavigateUrl='<%#GenerateURL(DataBinder.Eval(Container.DataItem,"Name"),DataBinder.Eval(Container.DataItem,"UserId"))%>'>
<asp:Image id="imgImage" runat="server" ImageUrl='<%# Eval("Logo") %>'
width="129px" Height="102px"></asp:Image>
</asp:HyperLink>

Public Shared Function GenerateURL(ByVal UserName As String, ByVal strUserId As Integer) As String
    Dim strTitle As String = UserName.ToString()

    '#region Generate SEO Friendly URL based on Title

    strTitle = strTitle.Trim()
    strTitle = strTitle.Trim("-"c)

    strTitle = strTitle.ToLower()
    Dim chars As Char() = "$%#@!*?;:~`+=()[]{}|\'<>,/^&"".".ToCharArray()
    strTitle = strTitle.Replace("c#", "C-Sharp")
    strTitle = strTitle.Replace("vb.net", "VB-Net")
    strTitle = strTitle.Replace("asp.net", "Asp-Net")
    strTitle = strTitle.Replace(".", "-")
    For i As Integer = 0 To chars.Length - 1
        Dim strChar As String = chars.GetValue(i).ToString()
        If strTitle.Contains(strChar) Then
            strTitle = strTitle.Replace(strChar, String.Empty)
        End If
    Next
    strTitle = strTitle.Replace(" ", "-")

    strTitle = strTitle.Replace("--", "-")
    strTitle = strTitle.Replace("---", "-")
    strTitle = strTitle.Replace("----", "-")
    strTitle = strTitle.Replace("-----", "-")
    strTitle = strTitle.Replace("----", "-")
    strTitle = strTitle.Replace("---", "-")
    strTitle = strTitle.Replace("--", "-")
    strTitle = strTitle.Trim()
    strTitle = strTitle.Trim("-"c)
    strTitle = (Convert.ToString("~/b/") & strTitle.ToString()) + "/" + strUserId.ToString()

    Return strTitle
End Function

configSections>

    <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
        <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
        <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
          <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/>
          <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
          <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
          <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
        </sectionGroup>
      </sectionGroup>
    </sectionGroup>

    <section name="rewriter" requirePermission="false" type="Intelligencia.UrlRewriter.Configuration.RewriterConfigurationSectionHandler, Intelligencia.UrlRewriter"/>
  </configSections>

<httpModules>
      <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

      <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter"/>
    </httpModules>

<rewriter>
  <rewrite url="~/b/(.+)/(.+)" to="~/ViewExternalWebSite.aspx?UserId=$2"/>
</rewriter>