Adding Sub-sub menu (3rd level) to Horizontal Menu

[caveDweller]

<!-- google_ad_section_end --> <hr style="color: rgb(235, 235, 235); background-color: rgb(235, 235, 235);" size="1"> <!-- / icon and title --> <!-- message --> <!-- google_ad_section_start -->Hi Flep,
I am desperately trying to add a 3rd level of menu (sub menu of the sub menu) to the very nice HorizontalMenu created by you.

I have made changes to Main.as and LoadingXML.as and menu.xml to try to achieve it. But I keep getting "Error #1009: Cannot access a property or method of a null object reference." on line 75 of LoadingXML.as I have tried troubleshooting this but can't get through this wall and now my head hurts.

I have clearly commented the start and the end of additions I have made to the action script files.

I wonder if you have any suggestions. Any help on this is greatly appreciated.

Thanks a lot.