See if this helps. How I wired mine. Ignore the note at the top, that problem was a bad alternator.
My push button is spliced into the wire from the switch to the solenoid, and nothing works but the brake lights unless the key is on.

EDIT: Here is how I think you need to correct your diagram. Hopefully somebody will critique it to make sure I am not messing with you.

Last edited by FriedGreenTmater; 03/05/2012 8:52 AM.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.