Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
Hi Tariq,
Have you upgrade with latest version?
It seems the upgrade have not taken place properly.
Please uninstall fully from your site and then reinstall again with latest version.
Follow the steps as
documentation.jomsocial.com/wiki/Upgrade..._3.0.x_on_Joomla_2.5
specially focus the title "Starting the Upgrade"
Thanks