.NET Webservice does not publish public class / properties

I have a webservice that interfaces with a SQL Database.  The webservice includes methods for interfacing with the database in the main class file in addition to several separate class files each representing a table in the database.  For instance, Customer.cs, Order.cs, OrderDetail.cs.  Each of these classes serializes fine and I can reference them without a problem in an aspx page and a Windows Form.  Recently though I added a new class Product that will not publish and I cannot come up with a reason why this is happening.  In fact any new class I create will not publish even if I copy the code from a class that does work into the file and modify the classname to match.  I'm not sure what I'm missing here.  I'm sure it must be something simple.

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Serialization;
 
/// <summary>
/// Summary description for Product
/// </summary>
[XmlInclude(typeof(Product))]
public class Product
{
    public String ProductID;
    public Int32 CategoryID;
    public Int32 ProductTypeID;
    public String ProductTitle;
    public String ProductDesc;
    public String EnlargedImage;
    public String Thumbnail;
    public DateTime RevisionDate;
    public Char Active;
    public Int32 OrderBy;
 
    public Product()
    { }
 
    public Product(String productID, Int32 categoryID, Int32   productTypeID, String productTitle,
        String productDesc, String enlargedImage, String thumbnail, DateTime revisionDate, Char active,
        Int32 orderBy)
    {
        ProductID = productID;
        CategoryID = categoryID;
        ProductTypeID = productTypeID;
        ProductTitle = productTitle;
        ProductDesc = productDesc;
        EnlargedImage = enlargedImage;
        Thumbnail = thumbnail;
        RevisionDate = revisionDate;
        Active = active;
        OrderBy = orderBy;
    }
}

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