This is a long shot but.... I have an old Craftsman garage door opener with only one working remote. This opener works based on 9 dip switches in the remote as well as the opener. I found a used second remote which is the same part number as the original. I matched the dip switch setting in the second remote but it still does not open the door. Does anyone happen to know if there is something else that needs to be done to connect the remote with the opener?