[SOLVED] menu background-color transparant doesn't work

Menu background-color transparant doesn't work. I tried:

div#menu1 ul.rMenu li {
background-color: transparent;
}

div#menu1 ul.rMenu li.current_page_item a:link,
div#menu1 ul.rMenu li.current_page_item a:active,
div#menu1 ul.rMenu li.current_page_item a:hover,
div#menu1 ul.rMenu li.current_page_item a:visited,
div#menu1 ul.rMenu li a:hover {
background-color: transparent;
}

But it doesn't work at all. I also names rMenu different but nothing!
My website is http://goo.gl/nR9Vob