The way to actually use this Module is given in the SOAP::WSDL::Manual.
Without that, good luck figuring it out. With that, it is much less difficult figuring this out. I was sending SOAP requests and getting responses about 2 hours after I read SOAP::WSDL::Manual.
This is true for modern versions, and 2.00.10, which is what's on my RHEL5 boxen.