Please help,

I have a 2003 Craftsman 1/2 HP GDO. The previous home owner installed it and I have did not receive the user's manual and was given only 1 remote. My father (who just recently installed 2 Craftsman GDO's at his home) tried to program his remote to open my door. Unfortunately, the outcome was not what we desired and now none of the remotes work, nor does my car homelink work. I have tried to follow the directions on the back of the door opener to reprogram and reset the codes, etc., but to no avail. I know that the GDO is receiving a signal from the remote because the green light on the back blinks when I hit the remote button. The GDO also works properly using the "door bell" wired to the GDO. Do you have any suggestions?

Sincerely,

Beth