XML Serialization Issue

I recently added a new property to a base object that had a property with a 
protected set. After adding the new propery to the class that inherited from 
that class, I get the below error. This web service was working until this 

System.InvalidOperationException: Unable to generate a temporary class 
error CS0272: The property or indexer 'USI.Data.Common.BizBase.IsValid' 
cannot be used in this context because the set accessor is inaccessible
error CS0272: The property or indexer 'USI.Data.Common.BizBase.IsValid' 
cannot be used in this context because the set accessor is inaccessible

   at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, 
CompilerParameters parameters, Evidence evidence)
   at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] 
xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, 
CompilerParameters parameters, Assembly assembly, Hashtable assemblies)
   at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, 
Type[] types, String defaultNamespace, String location, Evidence evidence)
   at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] 
mappings, Evidence evidence)
   at System.Web.Services.Protocols.MimeFormatter.GetInitializers(Type type, 
LogicalMethodInfo[] methodInfos)
   at System.Web.Services.Protocols.HttpServerType..ctor(Type type)
   at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, 
HttpContext context, HttpRequest request, HttpResponse response, Boolean& 

Here is a simplified version of the code :

[XmlIgnore(), SoapIgnore()]
public override bool IsValid {
    get {
        return true;
    protected set {
        //throw new Exception("The method or operation is not 

As you can see I tried adding the xmlignore and the soapignore properties to 
no avail. I have to override the IsValid because it is abstract as well. 

12/5/2005 6:38:13 PM
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