Hello, I installed an expansion module on a 7971 desk phone but all the lights are a steady amber. I have configured 22 of these thus far with no issues. The 7914 works on other phones. I have replaced the phone and the connecting cables but have the same result. The issue must be in the configuration but i have checked it several times. The phone is configured to allow the module on the system and the config also shows the button assignment. The phone system has also been rebooted. Any ideas?