CSS fix for a Joomla module

Hi, I am in the process of migrating an old site into a Joomla 2.5 site. I have converted the template without too many hassles, but the top menu used a module (MG Menu) to create a CSS horizontal dropdown menu. The module created a different markup and I have tried to convert it, but there is a tiny issue of a submenu always being shown, where in the original it was not. I need to fix this. It is probably a very simple fix for a CSS guru. I have included the original CSS file, and my attempt at a converted CSS file. The original site can be found at [login to view URL] and the delelopment 2.5 version can be found at [login to view URL]