Change "Drop Shadow" Color Option Disabled

I want to change the color of the DROP SHADOW itself--NOT the red box that I want to but the Drop Shadow behind...  I want to have a RED Drop Shadow behind the red box, but when I double-click on the default black box that is used to position the Drop Shadow, nothing happens.  In previous versions, a color palette would automatically appear and a new color could be selected.  This no longer seems to happen in 2017...  Is the problem with MY version of the software which is "buggy" or is this a technological code glitch that EVERYONE is experiencing in CorelDraw 2017?  Thanks! Jerry