Doepfer

hello
i'm finding that every time i turn on my modular i have to reset the scale on my a190 
interface.  i have saved it using the procedure outlined in the manual but still everytime i 
need to reset it.  there was a time when it would periodically retain the settings after 
powering down but now it never seems to.  any idea what the problem could be?  it's starting 
to drive me nuts and i am a patient man.
thanks!
sam