Wpfolio js and Submenu Issue

Hi
I looked and looked but cannot find this. Also posted on wpfolio forum but they suggested to post here
My Submenu under MY WORK (or PORTFOLIO) shows up and all works fine but when I try to hover the mouse over any of the submenus they disappear.(oddly enough sometimes they do show long enough for me to be able to click on them) Looked at some other sites with submenu – they do not seem to have that problem. What could be the cause of this?
http://www.crowephotography.co.za (only one PORTFOLIO or MY WORK TOP Menu has a submenu and that is the problem area)Steve suggested that maybe my JS does not load or load slowly? How could I check or rectify that?