I just bought another handset for my panasonic phone. I try to register it and it doesn't work. I have a KX-TG5622 base and the handset is KX-TGA560B. The base phone and another handset work fine.

In this case, the problem was solved by pressing "menu", "O", "O", then "ok" appears in the window. Press the soft key under "ok" and the phones link-up.

1st) you must identify the ranking order of your handsets. Put all your handsets in the main base cradle and it will tell you which phone is your handset ie: (1) (2) (3) (4). (if you are reseting a handset, chose a number that is missing to reset your phone to) Now, with NO handsets in the main base cradle. Hold your phone and press "menu", then key in the numbers 00. Now, don't do anything with your handset. Go to the main base cradle. On the bottom, where it says "locator" press the "select" button until you get the desired phone rank needed. H1,H2,H3 etc... Then, press and hold the "call" button, under "intercom". (The charging light should start flashing) Now, go to your handset and press the "OK" button on the top upper right corner. At this point, your phone should be working!

If you are still having problems, call Panasonic Customer Service at 1-800-211-7262 for tech support. PS: your handset may show model KX-560B, but your main cradle base will show the actual phone model listed as KX-TG5633