Adobe animate CC, Disabling a buttton

Hello,

I've been working with animate for nearly a month now. I am trying to make a monitoring interface. there is just one little problem.

I have a button which i wish to disable under certain circumstances. The only way I have found is to disable the mouseEnabled propertie. Unfortunately this doesn't change the brightness of the button. The first thing i tried was to change the Alpha of the object but this turned out ugly since the shadow is visible underneath the object.

Is there anyone who knows a better way of doing this? Without using alpha?