Hi Amahadevan,
If you are using JA T3V3, please check out user guide http://t3.joomlart.com/documentation/107-template-customization.html . There are difference between JA T3v2 and JA T3v3:
<blockquote>In JA T3v2, we use profile to override template. Each profile can be assign to one or many menus, the menus assigned will override the same menus in default profile.
In JA T3v3, we use style to override template. Each style can be assigned to one or many menus and the menus assigned will override the same menus in the default style.
</blockquote>
JA T3V3 uses style as Joomla default does instead of profile used in JAT3V2.
Regards