Hi
A Powermax Express should have the “Auto Enroll Supported” setting ticked as it should auto enroll. Your problem before was no communication at all. As it seems to be now communicating please tick this setting and try it again.
Before you restart HA, if you set your logger settings to this and upload a log file to pastebin/dropbox I’ll take a look through and see if I can help. Only then will I be able to properly see what’s going on. The first 1500 lines of the log file should do.
D 