Connect to WS security server using RSA signature using PHP.

I'm working with a soap client, trying to send and receive soap calls using PHP. Server have ws-security set up, and use an x.509 certificate for authentication. I need to digitally sign the SOAP message and send the request to the Server. I need your help to generate a valid signature and valid message structure which is acceptable at server. You can see the sample request here: [login to view URL] I already generated the structure but failed to verify signature. I am facing issue in signature generation. I need your help to generate the valid signatures. Developer with prior experience in WS security will be preferred. Please include the reference bid.