We're trying to use the Web Service Lookup in Spoon 4.2.0 but have trouble populating the "in" fields. For an API that requires two xml elements, we're trying to send, in the SOAP request,

...
<APIName>
<a>......</a>
<b>.....</b>
</APIName>
...

with all the proper namespace and attribute stuff. We build the xml elements and put them in the Name column of the "in" tab of the Web Service Lookup step, but we get this:

...
<APIName>
<a><a>......</a></a>
<b><b>.....</b></b>
</APIName>
...

We must be making a real rookie mistake (we are rookies!), but everything we've tried either gives this output, or no elements at all. What are we doing wrong?