Error #1034: Type Coercion failed: Error in FocusManager

Hi,

I am using ActionScript 3.0.

Here I want to setFocus on a DisplayObject(flash.display.DisplayObject).

I tried :

                    //var dispObject:DisplayObject;

                    //dispObject = code here to get displayObject;//valid DisplayObject got

                    var focusManager1:FocusManager = dispObject["focusManager"];
                    var component:IFocusManagerComponent = dispObject as IFocusManagerComponent;
                    if(focusManager1 != null && component != null)
                    {
                        focusManager1.setFocus(component);
                    }

But I am getting : Error #1034: Type Coercion failed: cannot convert mx.managers::FocusManager@3881e41 to mx.managers.FocusManager.

This is at line :  var focusManager1:FocusManager = dispObject["focusManager"];

The same code would work if I use mx.core.UIComponent instead of DisplayObject, I guess.

But I am not able to convert DisplayObject to UIComponent (invalid cast).

Can someone please help me.

Thanks,

Pradeep.