bit.ly/11DuQT5
DotNetNuke 6.2.6 SubMenu Does Not Appear at DDRMenu 2.0.2

Looks like old designer created skin using Artisteer.

Menu is rendered at following code:

[nav class="webstun-nav"]
<div class="webstun-nav-inner"]

<div id="Extra2" runat="server"]</div]</div]
<dnn:menu menustyle="Menu" runat="server"]
<templatearguments]
<dnn:templateargument name="class" value="webstun-hmenu"]</dnn:templateargument]

</div]


Top level pages are displayed on navigation menu, however subpages appear behind content (does not matter which page you browse).

I strongly think this is a z-index issue but couldn't figure out which css file to modify and which z-index to add for related property.

Any clues?