I have a customer with a 9620L. We upgraded them to 9630 (pre-8.0.42). Currently using 1151C1 power supply on their 9620L. Went to plug in 9630 with same power supply and it is dead. Light comes on power block but as soon as the Cat5 plugs into the phone, the light goes off and it is dead. Documentation states 1151C1 should work. Do I need a D1 power supply? Am I missing something?