VRCZ4-MRZ Issues

Hi:

I am a newbie and have read through many posts on the VRCZ4-MRZ. Thanks to those posts, I was able to set this up successfully with my VeraLite. I had problems with adding the local load, but using buttons 2 and 4 worked for me. I believe I setup the VRCZ4-MRZ to operate independently of Vera. Under device options I set the first GroupID to “1” then picked the devices to control. Second GroupID was 2, etc. Never assigned scenes to any off/on. After the initial configuration I changed the settings to never update. All good, appropriate devices go off and on with each button. However, most of the devices are dimmers, and when I use the bottom (dimmer) button on the controller, nothing happens. Suggestions?