I get reports from users asking for one or another webservice not working. Some of the problems arise due to the upgrade of our server, which a native SOAP extension that collides with nusoap, the library behind most the the webservices examples on Flash-db. This errors are addressed afaik.
Anyway if the webservice you're trying to test dowsn't work, check that the WSDL is still in place, since many of the webservices changr from free to paid or just simple move from one URL to another. If you find that WSDL change place, please let us know to update our files