how to synchronize the OperationDesc with the implementation class?

[Madeleine Wright]

Plwase can someone give me a clue as to what I'm doing wrong.  I'm 
trying to test faults and to include a fault in the wsdd I need to 
include an operation element but I'm obviously doing something wrong 
because I keep getting an Axis InternalException that says: "The 
OperationDesc for doIndex was not synchronized to a method of 
WI.WebIndexerImpl."  My operation element looks like this:
<operation name="doIndex" qname="tns.doIndex" xmlns:tns="http://WI"; 
returnType="xsd:string">
  	...
</operation>

How do I make the two synchronize please?
Thanks.