Wordpress nested shortcodes not working plug-in and theme

i am currently using a theme which comes with a set of shortcodes.

I would like to include a shortcode inside a shortcode. One comes from a social share plug-in called ShareThis whilst the other is part of the theme.

However when i nest the shortcode it just doesnt work.

I have also tried this plug-in: Outerbridge Nested Shortcodes but no luck. The shortcode im trying to add is below. [st_buttons]

[flip_image animate='flip' delay='' flip_on_appear='' front_image_link='' back_image_link='' background_color='#f2f2f2' back_text='[st_buttons]' link='' target='']

via Chebli Mohamed