Possibly Soap Version Mismatch

how i can changed the version of soap while writing web services

my client in C# giving error

Possible SOAP version mismatch : Envelope namespace

http://schemas.xmlsoap.org/wsdl was unexpected.

Expecting http://schemas.xmlsoap.org/soap/envelope

whats the issue ?????

Are you have set the same soap version in both applications?

i dont have access to client code…client player is build and consuming php web services created in non framework enviornment now i m trying to add web services as per YII framework and client cant consume YII web services