Document style webservice

Hello.
I am having a difficult time converting an existing rpc style web  
service to a document style web service.

I vend the service using:
WOWebServiceRegistrar.registerWebService(MyClassName.class, false);
This executes fine without errors.

However, I get the following error when i try to consume this  
webservice.

Couldnt find an appropriate operation for XML QName {0}
         at org.apache.axis.providers.java.MsgProvider.processMessage 
(MsgProvider.java:108)
         at org.apache.axis.providers.java.JavaProvider.invoke 
(JavaProvider.java:333)
         at org.apache.axis.strategies.InvocationStrategy.visit 
(InvocationStrategy.java:71)
         at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
         at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
         at org.apache.axis.handlers.soap.SOAPService.invoke 
(SOAPService.java:481)
         at org.apache.axis.server.AxisServer.invoke(AxisServer.java: 
323)
         at  
com.webobjects.appserver._private.WOWebService.performActionNamed 
(WOWebService.java:375)
         at  
com.webobjects.appserver._private.WOActionRequestHandler._handleRequest( 
WOActionRequestHandler.java:240)
         at  
com.webobjects.appserver._private.WOActionRequestHandler.handleRequest 
(WOActionRequestHandler.java:145)
         at  
com.webobjects.appserver._private.WOWebServiceRequestHandler.handleReque 
st(WOWebServiceRequestHandler.java:95)
         at com.webobjects.appserver.WOApplication.dispatchRequest 
(WOApplication.java:1306)
         at Application.dispatchRequest(Application.java:502)
         at com.webobjects.appserver._private.WOWorkerThread.runOnce 
(WOWorkerThread.java:173)
         at com.webobjects.appserver._private.WOWorkerThread.run 
(WOWorkerThread.java:254)
         at java.lang.Thread.run(Thread.java:552)

There is only one method in MyClass.
I am using version 1.1 of axis.jar.

Does this error look familiar to anyone?