Fix Menu: Dropdown shows in the top-level

Hello,

I had my html site converted to WordPress, and it was just bad work… My latest dilemma is the menu.

When I add sub-menus using the WordPress admin, my submenus are added to the top-level menu, and not as a dropdown box.

I think that the problem is related to the image is behind my menubar. The image expands when the submenu is added, and this expansion might be concealing the dropdown.

I’m trying to avoid getting rid of the image because 2 of my main menu items are actually links to different sites that mimic my header. Everything worked well while my site was html, so I know it’s doable.

Any advice on how to fix this?

Website: https://www.FreeMBB.com

Picture of the problem: https://dl.dropboxusercontent.com/u/24972863/Menu%20Problem.pdf

WordPress Version: 3.5.2

Thanks in advance,
Matt