you do not need a ticket number to list as far as I know if it ask for one just enter the ticket number on your zed ticket.
Excepted from AF, AA takes paper ticket, you should try to do it without a number.
To log on your ailine code EMP attached to it as a user name. (if you work for CO it will be COEMP)
Password is the first three numbers of your airline ticket stock.
If you do not succeed you can always call the nonrev line. You will or might not be accomodated at the gate without being listed