 import flash.accessibility.Accessibility;
 import flash.accessibility.AccessibilityProperties;
 import flash.events.Event;
+
 import mx.accessibility.AccConst;
 import mx.controls.Alert;
 import mx.core.UIComponent;
 import mx.core.mx_internal;
-import mx.managers.SystemManager;
+import mx.managers.ISystemManager;
 
 use namespace mx_internal;
 

			{
				titleBar = Alert(master).getTitleBar();

				SystemManager(master.parent).document.accessibilityProperties.silent = false;

				Accessibility.updateProperties();


		// that all accessible UIComponents understand.
		$eventHandler(event);
				
		const systemManager:ISystemManager = ISystemManager(master.parent);
		var titleBar:UIComponent;
		
		switch (event.type)
