[Scantronic 9800+ exit button problems]

hello 

I have the above alarm all working fine except for the doorbell which is the Exit Terminate button in day mode. it’s says in the user manual, quote:

Turning the Chime On/Off
Your system may be programmed so that a chime tone sounds whenever certain doors are opened while the system is unset. If your system has an Exit Terminate button, then it will act as a door bell while Chime is on. To turn Chime on or off:
1. Key in your access code. The display shows "_ _ "
2. Press 7 followed by y (Clear).

I have tried this and it doesn’t work, is there a programming feature in E mode that I’m missing?...

I’ve just re set the whole system in E mode and added the chime function to zone 1 (final exit zone) and have a brand new battery and all is working perfectly except for this one feature.. plz Help 
Many thanks 
Clare