3rd level menu not showing

Hi,

I’ve just installed you’re plugin and i think it’s awesome, it does exactly what i need, but I have a little problem with submenus.

In my website there is a menu with 2nd and 3rd level menus. I can expand the 2nd level menus just fine, but the 3rd level menus cannot be expanded (little arrow down missing).

There’s an option to activate somewhere? I need to add some custom CSS?

Thanks in advance for you’re help.

The page I need help with: [log in to see the link]