OWA 2013 - OWA does not display tasks option

Hi everyone,

I wonder if I could ask for your help.  My owa only displays "Outlook", "Calendar", "People". I do not see "Tasks" option after login.

With 2010 account I can see "Tasks" tab along with "Mail, Calendar and Contacts".
Could any one help me to understand why I am not able to see "Tasks" option with owa 2013 account.

Thanks,

Naresh