Ajax Enabled WCF service not working form remote server

Hi..

I have a simple AjaxEnabledWcfService named.... Service

It works fine with local IIS but gives error at remote server as (Service is Undefined...)

E.g.
[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed )]
public class Service
{
[OperationContract]
public string SayHello()
{
return "Good morning :" + DateTime.Now.ToString();
}
}

Any solution ???????