Problems hosting .Net Service (WCF) in IIS6 on Windows 2003 Server

<system.serviceModel>
    <services>
      <service name="WcfService3.Service1" behaviorConfiguration="WcfService3.Service1Behavior">
        <!-- Service Endpoints -->
        <endpoint address="" binding="wsHttpBinding" contract="WcfService3.IService1">
          <!--
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.
          -->
          <identity>
            <dns value="localhost"/>
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="WcfService3.Service1Behavior">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

                                              

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<%@ ServiceHost Language="VB" Debug="true" Service="WcfService3.Service1" CodeBehind="Service1.svc.vb" %>

                                              

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Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 01/06/2008 14:31:23 
Event time (UTC): 01/06/2008 13:31:23 
Event ID: 7cd3f18e23144b6e8d1b2538d3ca6e14 
Event sequence: 1 
Event occurrence: 1 
Event detail code: 0 
 
Application information: 
    Application domain: /LM/W3SVC/910693420/Root/Services-29-128568006831747500 
    Trust level: Full 
    Application Virtual Path: /Services 
    Application Path: D:\Sites\testwebsite\wcf\ 
    Machine name: DS18764 
 
Process information: 
    Process ID: 5480 
    Process name: aspnet_wp.exe 
    Account name: DS18764\ASPUser 
 
Exception information: 
    Exception type: HostingEnvironmentException 
    Exception message: Failed to access IIS metabase. 
 
Request information: 
    Request URL: http://www.mydomainname.com/services/Service1.svc 
    Request path: /services/Service1.svc 
    User host address: 217.x.x.x
    User:  
    Is authenticated: False 
    Authentication Type:  
    Thread account name: DS18764\ASPUser 
 
Thread information: 
    Thread ID: 1 
    Thread account name: DS18764\ASPUser 
    Is impersonating: False 
    Stack trace:    at System.Web.Configuration.MetabaseServerConfig.MapPathCaching(String siteID, VirtualPath path)
   at System.Web.Configuration.MetabaseServerConfig.System.Web.Configuration.IConfigMapPath2.MapPath(String siteID, VirtualPath vpath)
   at System.Web.Hosting.HostingEnvironment.MapPathActual(VirtualPath virtualPath, Boolean permitNull)
   at System.Web.CachedPathData.GetConfigPathData(String configPath)
   at System.Web.CachedPathData.GetConfigPathData(String configPath)
   at System.Web.CachedPathData.GetApplicationPathData()
   at System.Web.CachedPathData.GetVirtualPathData(VirtualPath virtualPath, Boolean permitPathsOutsideApp)
   at System.Web.Configuration.RuntimeConfig.GetLKGRuntimeConfig(VirtualPath path)
 
 
Custom event details: 
 
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

                                              

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Exception information: 
    Exception type: ConfigurationErrorsException 
    Exception message: Could not load file or assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. (D:\Sites\testwebsite.com\wcf\web.config line 104) (D:\Sites\testwebsite.com\wcf\web.config line 104) 
 

                                              

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