Create Web Service System from ABAP webservice

Hi, all.

I have an ABAP WebService created. But I can't use its WSDL URL (http://dbserv/webservices/skl.asmx?wsdl) to create Web Service System Alias.

Visual Composer shows an "Invalid Web System URL" error.

Using this ABAP WebService I successfully have created iView (http://dbserv/webservices/skl.asmx/GetS?nb=1120).

By use of WSDL URL of the WebService, deployed from NWDS, Web Service System creation successful (http://sapportal:50100/CalculatorService/Config1?wsdl).

What do I have to do to create Web System using URL: http://dbserv/webservices/skl.asmx?wsdl.

Regards, Sergey.