Many themez are not supporting widget. In order to make it widget supported you need to perform these steps:
1: Take a complete backup of your current theme
2: Open functions.php file of your theme. Add this code at the top of the page and then save and upload the file:
if ( function_exists(’register_sidebar’) )
3: Open sidebar.php file and add this line of code directly below the <ul> tag.
if ( !function_exists(’dynamic_sidebar’)
|| !dynamic_sidebar() ):
4: Scroll down at the bottom of the sidebar.php file until you see the closing </ul> tag. Now, above it add this code then save and upload your file.
<?php endif; ?>