Siebel wM Transports to wM Enterprise Integrator 50

Has anyone had any success in creating the handshake between Siebel 7.5 to wM EI using the wM Transport that came with the Siebel Adapter 4.2.1? We are trying to activate a request reply from Siebel using these transports. Need to know where the body of the message goes. Documentation only specifies documentData on the reply part.