i ve just succeed in deploying my service to the website and make it available on line. and this is the URL of my service "http://www.odp-project.com/Gtest2/Service.svc" and when i used the WCF test Client tool the tool was able to add the service successfully but when i tried to invoke any of the service methods i got an exception "The remote server returned an unexpected response: (417) Expectation Failed." what can i do to fix this problem ????!!!!