When calling SOAP webservices from LabVIEW you cant use the VIS created using the WebService Inport Wizard as the work making calls to .net. Instead you can do the call manually using the HTTP VIs located in the Data Comunication >> Protocols >> HTML palette.
Here is an example of calling a Soap webservice with it.
NOTE: For Hosting webservices you can use the RESTful Web services
Description-Separate-2Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.
per mobilefish.com "The Countries web service is permanently disabled because this service is being misused."