Dudley-
You should have the messages defined in your wsdl . for example
<message name="MySoapIn">
<part name="parameters" element="enr:My_Request"/>
</message>
where My_Request is your parameter which should defined in the <types>. Now this defined message will be plugged with the port. So My_Request becomes the input parameter for the method "
testOperation"
<portType name="MySoap">
<operation name="testOperation">
<input message="s0:MySoapIn"/>
<output message="s0:SoapOut"/>
</operation>
</portType>
[ June 30, 2007: Message edited by: Raghav Mathur ]