I thought I'd share, I don't know if this was intentional or not, but as I was having difficulting using the web service component (I was getting an error regarding no root element in the xml) I discovered that you can't call a function that has a void return.
Since I wasn't trying to read any data back from the web service, I couldn't figure out why I was getting an error regarding the return data.
Once I simply had the webservice return "OK" or "ERROR", then the IVR didn't complain about it any more.
This was a SOAP based web service.

