Agila Radio de-activate radio code?

I have an Agila with radio cdr2005. How do I disable the anti-theft device. I have the code and can get the radio off 'safe' mode, but the radio has a dodgy on/off power button and it is getting increasingly difficult to use so I leave it on.
This would be fine, but also have a dodgy battery (dispute with AA) and am having to get it off safe mode rather too often.
There are instcuctions in the manual which make no sense to me!

larbawn
January 2014