I am new here and thank all of you for your help.
Hardware KPL 2487S, LampLinc 2457D2X, ISY99i/IR Pro v.3.1.17. I have a similar problem, trying to control the lamplinc through a scene, but do not understand how to get the scenes to operate in the way described by LeeG, "The way to achieve the desired effect is to define one ISY Scene. Add the ICON Switch and the LampLinc as Controllers of the one ISY Scene. Turning the ISY Scene On/Off from the ISY or the ICON Switch will control both the ICON Switch and the LampLinc".
I created an ISY scene "control light" and added the D button from the KPL and the lamp linc both as controllers. Turning the scene on and off turns the KPL button LED on and off but not the lamplinc (or light). This is probably INSTEON 101 but I have not been able to make it work. Thank you for any help.