Version FPD 3.0.x

- Opencart version 1.5.5.x ; 1.5.6.x

+ Reason: 

jQuery v1.7.1 and jQuery UI are lower

+ Solutions:
Need jQuery jquery-1.8.3 and jQuery UI - v1.11.2 or higher
At /catalog/view/theme/default/template/common/header.tpl
jQuery current version is "catalog/view/javascript/jquery/jquery-1.7.1.min.js" change to "catalog/view/javascript/fancy_design/jquery-1.8.3.min.js"

jQuery UI current version is "catalog/view/javascript/jquery/ui/jquery-ui-1.8.16.custom.min.js" change to "catalog/view/javascript/fancy_design/jquery-ui.min.js"