Notes 8.5.1: error importing a wsdl

I created a web service with Microsoft Dynamics NAV. While trying to import the wsdl in Notes 8.5.1 I receive the error message"No WSDL returned from URL: http://localhost:7047/DynamicsNAV/WS/Codeunit/Test"

(“Kein WSDL zurückgegeben von URL: http://localhost:7047/DynamicsNAV/WS/Codeunit/Test”)

Importing the wsdl through this url in Visual Studio causes no problem.

What can I do?