A few comments for you. First, the association group only supports 5 devices. 
Other than that I recommend that you configure the dimmer as follows:
- Local control disabled
- Set the “Dimming Speed” option to 0 (this is the first preference option).
- Dimming speed (from switch), Ramp rate, Ramp rate (from switch) should be set to 101 (to keep them the same as the “Dimming Speed”.
- Default level for local & Z-wave to 100
- State After Power Restored to 99
You can disable remote control as well, but remember that if you ever need to turn the switch off or change a setting, you need to enable remote control to do so. This includes setting up the associations. So if you have remote control disabled and you try to setup the associations with the tool, it won’t work.
Try setting it up with Group #2 first and test it. On & Off should work in this test and once everything looks good, you can try group 4.
With all of this in mind, check the “Troubleshooting” section in the first post if you are still having problems.