check your WSLD file location or copy the WSDL file localy and execute:
bprowsdldoc [filename]
If bprowsdldoc arrives to documment the WSDL is OK you can consume the web-service in 4GL.
else ... don't spend your time ... nothing works, Progress is very strict on respect WSDL 1.0, XML 1.0 and UTF-8
If the service .Net was exposed on WS2 ... Progress don't understand ... forget.