Need help enrolling Insteon devices


I enrolled two Insteon devices when I first installed the Elk-M1G. I had issues doing it then but they ended up being enrolled and I can controll them via the keypad. Since then I have added more devices but I cant get them enrolled or they are not listing in the lighting part of the keypad menu. Everything went as documented in the manual, lights flashing on the m1xsp. But I still cant control the light via the ELK. Any suggestions what else I should be doing? Thanks.