My newbie mistake there.
Still having some issues though (HTTP:500). The webservice does work from .Net, PHP and Java. The only things I can see are differences in the SOAP message from that generated elsewhere:
instead of this (as generated for .Net web references):
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
I'm not certain, but this could be causing the HTTP:500 error.
The only other potential issue I can see is that in a successfully tested example, using an HTTP POST of the SOAP to the webservice, the booleans are represented as "true"/"false" rather than "Y"/"N" from Tersus.
Thanks in advance.
For best results, use the Firefox browser..