How to consume .Net Web service in sap

Dear All,

I am facing an issue while creating consuming web service using url: http://199.999.99.99:8090/Service1.asmx?WSDL , at the end while pressing complete button  prompt an exception class error ,

Not implemented

Exception of class CX_SIDL_INTERNAL_ERROR

So please give me some useful solution regarding this error, So that I can resolve this error.

Thanks,

Muhammad Taha