Problem with menu

1

Hello! help solve the problem with the menu, i make menu with submenu, when i click on submenu, i see error:

ArgumentError: Error #1063: Argument count mismatch on Classes/openTab(). Expected 1, got 2. and submenu not work, this my function for submenuItemClick

function onSubMenuItemClick(evt:Event):void{	
			if(MainLoader==null)
			if(CurMenu!=SubMenuItems[evt.currentTarget.ii].MIndex){
				trace("MINdex="+SubMenuItems[evt.currentTarget.ii].MIndex);
				CurMenu=SubMenuItems[evt.currentTarget.ii].MIndex;
				SubMenuOpen=evt.currentTarget.ii;
				trace("SUB "+evt.currentTarget.i);
				loadCurMenu();
			}else{
				trace("SUB "+evt.currentTarget.i);
Screen.Curr.content.openTab(evt.currentTarget.i, SubMenuItems[evt.currentTarget.ii].Label);
			}
		}

if i look in Premmit debugging, i see this line:

Screen.Curr.content.openTab(evt.currentTarget.i, SubMenuItems[evt.currentTarget.ii].Label);

Please, Help me