Craftsman Garage Door remotes will not work

[Kevin lindberg]

Re: Craftsman 1/2hp. Trying to reset the codes on my two remotes I have cancel the codes
Now can not reset the codes back into the remotes Holding the Remote button then pressing the red button on the back of the motor The green light should flash but it does not Any ideas what is wrong? Following the manual no luck. Even replaced batteries

[pushkins]

Disconnect the entire motor from it's power source, wait a couple of minutes and then try to reset the remotes.