Hi Srihari,
I believe you need an ABAP person to do that for you. Just send him the first link in my previous post and work with him on generating the proxy for the WS you want to call. Once this is done, the ABAP-er would have to go to the other function modlue that was generated by the configuration you made and call the proxy one after mapping the values properly.
That's all... 
Regards,
Boris