Hi Amol,
Please refer to the following guide, we had the similar issues when we performed the upgrade.
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/605c530a-abe7-2f10-a186-c6880ebc71a4?overridelayout=t…
How to Upload Backend Roles to SAP Netweaver Portal
Thanks
Adil