[Theme: Sixhours] Dropdown menu option

Hi there,
I have recently installed the six hours theme. It’s a fantastic theme, really great looking.

My question is, I have added a custom static menu to my site and am trying to add drop down menu items to each of my static buttons. I cannot seem to get this to work, I drag and drop the relevant pages under the static category but when I save and refresh the changes do not update.

I wondered if this theme supports drop down menus?

http://ww.wp.xz.cn/extend/themes/sixhours/