为什么我的wcf Web服务引用中有额外的参数？

I'm trying to convert an ASP.Net web service to WCF application. The client is on the .Net Compact Framework which does not support WCF so I need to make sure the WCF keeps supporting ASP style webservices. When I add the web service reference in Visual Studio the generated proxy class' methods have extra arguments. I'm trying to convert an ASP.Net web service to