Gk Tabs Wordpress menu

Hi, I have a problem with the module menu iconee GKtabs. All iconee are the same, how do I put them different?

This is the URL:

http://ticketingsystem.imseolab.it/

Cloud, multioperatore, statistiche, e mobile have the same icons
tabs_small_icons.png

Thanks in advance

Please check this tab configuration:
http://www.gavick.com/documentation/wp- ... ext-36.png

Custom Css class - you can use gk-tab-1 to gk-tab-8 icons:
http://demo.gavick.com/wordpress/appspr ... age_id=932

Thanks!!!