On research i found that multiple patches has to be applied to the weblogic server to get case management in SOA 11g.
Some of the patches were directly applicable via opatch however some of them needed to be applied through Smart update.
It is a very easy process to update patch using Smart Updates.
Download your patch and unzip it to the following location
$Middleware_home\utils\bsu\cache_dir
If you do not have a directory cache_dir then create one and unzip the patches there.
Once you unzip the patch.
Go to the following location
$Middleware_home\utils\bsu
and double click on bsu.cmd
It will open the utility for smart updates.
Select your installation and you will find that the patches are listed in the panel "Download Patches"
Click on apply and this will apply the patch.
Once the patch will be applied it will move to applied patches list.
