Changing soap prefix in jaxws

[chets patel]

Hi I want to change the Soap prefix. By default it is taking "env". But I want to change it to soap. I tried below code but it is not working.

     envelope.addNamespaceDeclaration("soap", "http://www.w3.org/2003/05/soap-envelope"); 
     envelope.setPrefix("soap");

It is just adding namespace declaration. but not changing the prefix.
I searched a lot and tried all possible solutions available on net. But not a single solution worked for me.

Thanks in advance.
Please help me. I am stuck.