Hi Raam,
have you performed the necessary steps like e.g. adjusting the repository of the enhanced views after the upgrade? If not please check the following document for the necessary steps and some solutions to common problems in a SAP CRM EhP3 upgrade:
http://scn.sap.com/community/crm/upgrades-and-enhancement-packs/blog/2014/02/21/sap-crm-ehp3-upgrade
Christian