I have wlc 4400 running on 6.0.196.0, get new wlc 2500 with 7.0.220.0, on 4400, 12 AP only one will register onto 2500. Both 4400 and 2500 on the same subnet. how to let AP register on 2500 rather than 4400AP model:on 4400 now: AIR-AP1242AG-A-K9, AI...