Issue with dropdown menus and jscript/flowplayer

Hi everyone!
I’ve been trying to work this out for a long time with my mediocre skills. I’m trying to turn our existing nav menu into a multi-lvel dropdown using purely css. Our current menu uses wp_list_pages. The problem I’ve run into is the dropdown items don’t appear below the flowplayer on our homepage, but it doesn’t over the content on the rest of the pages either. So I don’t think it’s a jscript/flowplayer issue. I’ve tried adjusting the z-index on various things to no avail. Our website is https://www.socius1.com. I haven’t been able to hack a dropdown plugin to look and function like our current nav either.

Can anyone help please?

Thanks so much in advance!