from .NET to PHP+NuSOAP

Hi all, I have software made by other company with ASP.NET The program is web service program who comunicate with client side - windows application usign SOAP messages. I have all of the source files from this project developed via .NET. My question: Is a possible usign the same WSDL file from old dotNET version of this web service, to my new php+nuSOAP web service? I don't have the source code for client side. The basicly question is keeping the old WSDL file and developing the new web service in php usign the WSDL file.