Changing the SOAP namespace

[Magesh]

I am writing an application to consume a web service developed in java. I
have created a proxy class to use in my application. On intercepting the
SOAP requests and responses, i found that the Namespace url used by the .NET
is

xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"

But the schema for request requires the soap namespace to be

xmlns:SOAP="urn:schemas-xml-xmlsoap-org:soap.v1"

What should i do to replace the default namespace followed by .NET?

Thanks in adv.

Magesh