Unable to register handsets to

From the manual:

1) Before registering the extra handset, the battery pack MUST be charged for 15-20
hours.
2) With the main base in standby mode, press the MENU soft key on the base.
3) Press /vol/∧ or /vol/∨ on the base to select H S R e g i s t r a t i o n, and then
press the OK soft key.
4) On the handset, press and hold # for two seconds. To cancel registration, press
the CANCEL soft key on the base.
5) While the handset is registering, H a n d s e t R e g i s t e r i n g will appear in the Handset
LCD. When R e g i s t r a t i o n C o m p l e t e is displayed, the handset has been registered
to the base. If R e g i s t r a t i o n F a i l e d appears, please try these steps again.


Geno