Menu issue with new 3.0.1 on blog menu feature

Attempting to add a new menu to blog using wp-menu feature in wordpress 3.0.1, added a wp-plugin named “Dropdown Menu Widget”, here’s the URL of my blog. http://bassonline.com/wp/

Menu was working fine at the start, as I add another link/page to the menu, it got slower…when I would click save. Now I am getting this error “Fatal error: Maximum execution time of 30 seconds exceeded in /home1/lakeokee/public_html/bassonline.com/wp/wp-includes/plugin.php on line 135”
“Fatal error: Maximum execution time of 30 seconds exceeded in /home1/lakeokee/public_html/bassonline.com/wp/wp-includes/wp-db.php on line 1262”

Sometimes other Fatal errors always the same just with a different line # at the end.

The WP menu system handled the menu fine, mutable level at around 250 pages, once I went over 300 is when the errors happen.

My question is, can WP menu system build the menu system in 3.0.1 that will handle access of 400 pages?

If so, what changes do I need to make?

If not, can anyone suggest a easy vertical menu system that works with WP that is functional at this level?

Thanks!