Possible SOAP version mismatch:

Hi,

I am tring to access a Axis2 webservice in which i send an xml file and i am
supposed to receive other file as attachement through my .Net client. I am
getting following error when i try to reach the web service "Possible SOAP
version mismatch: Envelope namespace http://www.w3.org/2003/05/soap-envelope
was unexpected. Expecting http://schemas.xmlsoap.org/soap/envelope/."

Surprisingly i dont get such error when i try to access a simple web service
(such as of adding two numbers) on the same axis2 server.

Any leads ??

Ashish