I added 5 menu item and each of them have diffrent no of sub menu item .Offcourse a page is opened on the click of last or you can say leaf  menu item all things are working fine .But suddenly all the menu items and Dnn built in host and admin menu item gets disappear they are not shown on main menubar of the Dnn home page.

So i am not able to accesss my pages

How i can get the menuitems and dnn admin and host menu to be shown again in the dnn home page.

All the pages added by me are still exist,As i can see them in the parent page property items if i click on the Add link of the dnn Which allows us to add new page .