Hosting WCF Rest in IIS 5.1

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IIS5.1

ASP.NET

IIS

WCF

REST

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Hi Guys,

I have a WCF rest which is working fine in my development machine (Visual Studio web server). But I can not make it work in my QA server which is windows XP with IIS 5.1 (SSL enabled). ("Bad Request" or "not found")
If I go to the IIS and set the mapping ".*" to "aspnet_isapi.dll", then everything will be fine. but for some reason I don't want to do that (for example I will lose the default document behaviour!).

Is there any good way to solve this problem?

Here is my server code:

[ServiceContract]
[AspNetCompatibilityRequirements(RequirementsMode= AspNetCompatibilityRequirementsMode.Allowed)]
public class AjaxJSON : WCFBase

  [WebGet(ResponseFormat = WebMessageFormat.Json, UriTemplate= "/Obj/Get/Status/{ObjID}")]                
  public AjaxJSONResponse_ObjIDStatus getImage(string ObjID)
  {
     // Do something and return 
  }
}

and I have this code in my Global.asax

RouteTable.Routes.Add(new ServiceRoute("Rest",
     new WebServiceHostFactory(),
     typeof(Test.AjaxJSON)));

here is my config file ( application works in my development machine without this configuration using default configuration)

<system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
    <bindings>
        <basicHttpBinding>
            <binding name="AjaxJSONSBinding">
                <security mode="Transport">
                    <transport clientCredentialType="Windows" proxyCredentialType="None"/>
                </security>
            </binding>
        </basicHttpBinding>
    </bindings>
    <behaviors>
        <serviceBehaviors>
            <behavior name="AjaxJSONServiceBehavior">
                <serviceMetadata httpsGetEnabled="true"/>
                <serviceDebug includeExceptionDetailInFaults="false"/>
            </behavior>
        </serviceBehaviors>
    </behaviors>
    <services>
        <service behaviorConfiguration="AjaxJSONServiceBehavior" name="Test.AjaxJSON">
            <endpoint address="" binding="basicHttpBinding" bindingConfiguration="AjaxJSONSBinding" contract="Test.AjaxJSON"/>
        </service>
    </services>
</system.serviceModel>

I have also tried calling the .svc from the Javascript (JQuery). but no chance!

all responses are welcome.

Thank you.