Using checkbox / radio button / progress bar in Flex 3 modules

In my project environment, I have 2 projects.

MyApp and MyModule

MyApp loads MyModule. When it loads, it tries to get a class of type DisplayObject and add it to the container.

The problem occurs when I try to use a checkbox / radio button / progress bar.

The checkbox and radio button are displayed just like normal buttons and the progress bar drops:

"Instant action taken for non-constructor."

Line 958 in ProgressBar.as

if (!_barMask)
        {
            if (FlexVersion.compatibilityVersion >= FlexVersion.VERSION_3_0)
            {
                var barMaskClass:Class = getStyle("maskSkin");
                _barMask = new barMaskClass(); // CRASH!!
            }
            else
            {
                _barMask = new UIComponent();
            }    

            _barMask.visible = true;
            _bar.addChild(DisplayObject(_barMask));
            UIComponent(_bar).mask = DisplayObject(_barMask);
        } 

      

        
        
        
      

    

Does anyone know how to use controls in a module correctly?