Callable Object - Web Service: Initialization failure in GenericServiceFact

Hello,
I am just trying to do the NetWeaver 7.0 exercise
"Callable Objects: Web Service –
...In this exercise you will create a callable object as an external web service. A prerequisite to the exercise is that ... the web services container settings in the J2EE Visual Administrator must be set to allow access to the internet.
Author: Composite Application Framework Product Management "
However, when setting up the Callable Object, after entering the WSDL-URL given in the pdf I get the error "<b>Initialization failure in GenericServiceFactory when trying to load  http://www.webservicex.net/WeatherForecast.asmx?WSDL</b> ".
Is it the missing activation of internet-access in the J2EE Web container? I can't find any such parameter in the J2EE-config tool (and where has the Visual Admin gone?).
Regards,
Jens

.

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