i use rsgallery2 it was working fine but i got error today when i click on inage thumb for larger vied i get this error

<a href="
Fatal error: Call to undefined function imagettfbbox() in /home/nepalici/public_html/administrator/components/com_rsgallery2/includes/img.utils.php on line 860

i am worried by this problem  vist this link to find out more

http://www.nepalicircle.com/index.php?option=com_rsgallery2&Itemid=29&page=inline&id=5&catid=4&limitstart=0

How can i fix this problem plz help

Guys,

This isn't called the Duplicate Threads for nothing.
Do a forum search.
Closing this thread.