PHP使用用c＃编写的WCF4.0 Web服务的过期副本

I have written a WCF 4.0 web service in C# which is using per session instance context mode. Another developer is using PHP on a LAMP stack set up using vagrants to access this service. After initial and successful connection attempts I have modified the service, but we cannot access the new functions with PHP. I have written a WCF 4.0 web service in C# whic