[SOLVED] drop down menu centred

Hi,

I recently added this to the css to make the menu even space which is ok.
/* space menu items across width */
ul.rMenu li {
width:8%;
text-align:center;
}
/*reset for submenus*/
ul.rMenu li ul li {
width:8em;
margin-right: 0;
}


What I want to do is make the drop down menu to drop right under the menu, at the moment it drops down to the left. I want the drop down menu category to be right under it not to the left. http://seminarseeker.com/

Thanks

Andre