"An error was discovered processing the <wsse:Security> header"
Solution :
1) Select WSDL security from Edit Request .
2) Click Add under Algorithm Stocks-Stack Contents
3) Select different options after checking with dev team ,but i selected time stamp and user name token .
4) Give time out details like 60 sec ,for user name token give user name and password .
5) Re invoke your request .
This will solver security header error.