you don't have to hit record.
- hit button"automation",
- above the normal logic channelstrip there is a button default set to "off".
- change it to "latch" or "touch". one of them overwrites data. don't remember which one....
- hit play and tweak.
and don't forget to set the button from "touch" to "read" after you recorded your automation. otherwise your automation data will be overwritten.
happy tweaking & cheers!