Cabin Light ECB?

[capdave]

Hello,
I just installed some general downlighting under the glareshield and wired it into the "cabin Lights " circuit. The lights are on a switched rheostat dimmer (the kind that clicks off at full dim).
However, unless I go to the check-elec page and manually turn that CB on every time, the lights will not operate. Seems that the breaker deactivates every time the avionics are powered down. I have tried selecting "on" on the page but it doesn't seem to stay on.
Any suggestions? am I missing something here?
Thanks