Hi Nilofer
So it is the 'Related Activities Launcher' iView. Could you please check certain configurations as explained in below links:
ESS in MSS Ehp5 - Call standard WDA from related activities
Some more information for Related Activities Launcher:
http://service.sap.com/sap/support/notes/1048386
http://service.sap.com/sap/support/notes/1407894
(Some tracing in Homepage framework and PCD iViews in the system will help over here.)
Thanks
Deepak