I pruchased 'sticky labels' extension form this URL http://www.opencart.com/index.php?route ... cky%20cart
As per the insturction i uploaded all the files to their respective location. After installing this module I go to Extension > Modules > Sticky labels > [edit] But I am not able to getting the preview of the Sticky

So pease help me out to find the issue.
Installation website URL: http://paleov2.vm-host.net/admin/
Thanks
Yogesh