Changing Invocation Parameters 
When you select the Web service you want to test, the system loads the corresponding WSDL file. This file contains information about the endpoints configured on the selected system. You can choose one of these endpoints to run the test. If you have the same service running on a different system, you can choose to test one of its endpoints. To do this, you need to provide the location of the endpoint.
When the selected endpoint requires basic HTTP authentication, you can enter the login data in advance. You can also set the timeout for the test.
Prerequisites
You have selected the Web service you want to test.
You know the location of the endpoint you want to test.
You know the user name and password for the endpoints that require authentication.
Procedure
Choose the Invocation Parameters pushbutton.
Select the service endpoint you want to use during the test:
To use an endpoint available on the system on which you found the service definition, select Predefined and choose an endpoint from the list.
To use an endpoint available on a different system, select Custom and enter the endpoint location.
You can get the endpoint location from the location attribute of the corresponding address tag in the service definition file. More information: Managing WSDL Documents
Modify the response timeout as necessary.
Select the authentication type for the selected endpoint:
Choose None when there is no HTTP authentication required.
Choose HTTP Authentication when you need to use a user name and password to access the endpoint, and enter the required data.
NoteIn Web Services Navigator, you can test only service endpoints that require basic HTTP authentication (User ID/Password) or no authentication.
End of the note.Choose OK.