I have a server-side asynchronous web method that I built using advice from this article. http://msdn2.microsoft.com/en-us/library/aa480516.aspx

The web method works great, until I add the soapServerProtocolFactory configuration tag that adds the WseProtocolFactory to the server side. It throws a null pointer exception error. But that error comes from the WSE trying to access the HTTPContext before it has been given back. I don't know what the real error is. Has anyone ran into this problem? Does WSE 3.0 support the server-side asynchronous web method model? Here is a copy of the error I get.

Type : System.NullReferenceException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Message : Object reference not set to an instance of an object.
Source : Microsoft.Web.Services3
Help link :
Data : System.Collections.ListDictionaryInternal
TargetSite : Microsoft.Web.Services3.StateManager GetOrCreateSessionStateFromHttpContext()
Stack Trace : at Microsoft.Web.Services3.WseProtocol.GetOrCreateSes sionStateFromHttpContext()
at Microsoft.Web.Services3.WseProtocol.GetWriterForMe ssage(SoapServerMessage message, Int32 bufferSize)
at System.Web.Services.Protocols.SoapServerProtocol.W riteException(Exception e, Stream outputStream)
at System.Web.Services.Protocols.WebServiceHandler.Wr iteException(Exception e)
at System.Web.Services.Protocols.WebServiceHandler.En dInvoke(IAsyncResult asyncResult)
at System.Web.Services.Protocols.WebServiceHandler.En dCoreProcessRequest(IAsyncResult asyncResult)
at System.Web.Services.Protocols.AsyncSessionlessHand ler.EndProcessRequest(IAsyncResult asyncResult)
at System.Web.HttpApplication.CallHandlerExecutionSte p.OnAsyncHandlerCompletion(IAsyncResult ar)


Any help? Notice this is not calling a web method asynchronous , this is a server side asynchronous web method.