Menu doesnt show child pages in WP 3.0

Hello!

I got my old theme ready to support WP 3.0 menu, with tutorials help.

I replaced the code in my header that used to call the old menu with <?php wp_nav_menu(); ?> (kept it wrapped in a custom div [Mainmenu] that styled that menu.

It worked to a point. The menu shows as normal but it doesnt display any child pages associated (it doesnt show the dropdown menu when you hover in the parent menu title).

Can anyone help me on this one? I’m kind of clueless. My site is https://pararir.com and the theme I’m using is DynaBlue from WebDesignLessons.com