Trouble with GenerateScriptType

.NET Framework 2.0

System.Web.Extensions (version 1.0.61025.0)

I am attempting to use the GenerateScriptType attribute to generate client-side script for a very simple custom class I have written.  Here is some source for the type and web service class definition:

 namespace Web.Services
{
public class AgencyType
{
public string region { get { return "Region"; } }
public string subgrantee { get { return "Subgrantee"; } }
}

/// <summary>
/// Summary description for BudgetService
/// </summary>
///
[WebService(Namespace = "http://tempuri.org/&qu ...