The symptoms are that the 2475SBD responds fine directly from the console or when manually linked to a KPL. It still does not respond, however, when put in a scene and controlled by a KPL. (Being new to this forum, I'm assuming KPL is the abbreviation for "Key Pad Link".)
As recommended, I removed it from the scene and then added it back....no response.
I'm wondering if the 2475SDB being recognized in 3.1.16 as an "unsupported device" is a factor in this "scene" problem?
Thanks.