Hi Rashida,
Thank you, that worked ! I just had work out what you were saying.
But just to help future readers of the thread, if you are using a 'Separator' as a menu item it needs to be changed to a URL.
So go to Menus, and select the menu you wish to edit (for example - main menu) then select the menu itme that is a 'Separator' type - in the Menu Item Type hit the 'SELECT' button - then click on 'System Links' ... change the menu item type from being a 'Separator' menu item type... to being a URL ... and place a hash(#) in the URL field.
Cheers,
Michael