Before you start searching, you need to press and hold the Page button on the basestation until it bleeps (a double-bleep I think).
It should then find the basestation.
If you have problems still, you should be able to un-register handsets using a menu on a registered handset.
I found the user manual for the BT Lyric 2100 on http://www.telephonesonline.co.uk/_cordless_phones.asp
This uses a similar system.
You may be able to get other instructions from there.
Good luck
Mike Read, July 2007
