Cascading Menu do not show up for siteground Template

[schooler]

HI,

I have my site hosted at Siteground, I have downloaded the ver 1.5 template
Name: sg - Joomla 1.5

The nice drop down menu across the top does not show up when I view my page.

I use Template manager and edit the template. The bottom settable parameter is :

Cascading Top Menu (No or Yes). Default is no,...I set it to yes. This promptly caused the web site to crash. Very similar error to what RuudM was posting in January of this year in this forum.

What am I doing wrong? This menu is pretty crucial to what I need this page for.

Thanks

[patjuh112]

Fatal error: Call to a member function on a non-object in ...\templates\siteground\sg_menus\SGMenu.php on line 87
is what I get :) no tabbed fancy topmenu for me :(