SAP FIORI MyInbox Approve/Reject buttons doesn't work

Hi All,

I did all the configurations related to SAP FIORI My Inbox , every thing working as expected except Approve /Reject Buttons.

I have a work item which has decision boxes like Approve/Reject . As per the help document , I have completed Maintain Task Names and Decision Options , now I can see the Approve in Green , Reject in yellow  for selected work item  but When I click on Approve button nothing happens. The button seems to me there is no action triggering when I click on it.

Is there any configuration I am missing here other then the details provided from the below link? I have followed all the steps as per the link from SAP.

http://help.sap.com/fiori_bs2013/helpdata/en/41/fd595461fce630e10000000a44538d/content.htm

Thanks

Krishna