Simply test that a web service is running from another app

add the web service as a Web Reference to the project. (right-click on Project --> Add Web Reference...)

then create an instance of the web service.  then you can call the web methods of web service.

http://[servername or IP address]/[webservice name]

you will get a page displaying the web methods for the web service.  If you get a page, then the webservice is running.  if you don't get a page, then you have a problem somewhere.