Hi Aihswarya,
Please refer wiki page:
Diagnostics Agents - SAP Solution Manager Setup - SCN Wiki
Also,
Run RTCCTOOL in all ABAP systmes and update ST-Pi and ST-A/PI
http://wiki.sdn.sap.com/wiki/display/SM/EWA+7.1+Display+and+Schedule
http://wiki.sdn.sap.com/wiki/display/SM/The+EWA+workflow+-+a+closer+look
All other aspects will be covered in System Preparation and Basic Configuration.
Make sure above is executed correctly.
Divyanshu