In Addition to that there are few other options are available for SSO2DB.
The SSO2DB option Use Single Sign On when refreshing reports at view time, while listed for all databases only works for Oracle and SQL Server.
Please check the below urls for the same.
http://scn.sap.com/thread/1491376
http://scn.sap.com/message/8302373
PLease check the below SAP note also. for Back End SSO aka Database SSO or SSO2DB
1748508 - What is Single Sign-On (SSO)