I am new to the web services Protocol, I am trying to pass the Authentication credentials in the header of the web service call, my question is, am i supposed to use web_add_Header function to pass the credentials because currently i am getting ACCESS VIOLATION error when i directly copy and paste the "<wsse security" (this is the part which has the Username and password)part from a sample SOAP request i got from another tester and where exactly should i put the web_add_header function in the script? My question is generic, so please help me by asking any specific information.