DRM Problem

Since the last update I am receiving a DRM error trying to watch Amazon videos. I can watch them in Firefox and Chrome but not in IceDragon where I prefer because they stream better. I have uninstalled and reinstalled both IceDragon and Silverlight but this has not fixed the issue. I have verified that the switches are checked per Amazon’s help under the Playback tab in the Silverlight window. I am beside myself at this point. I have no problem watching Youtube licensed content.