Cathay Pacific Asia Miles - Problem with internet checkin, urgent help needed

I am with my family of four in Bali. I try to checkin by internet (this is 35 hours before departure). As MP the booking shows and it tells me to checkin online (bottom right of flight info). But when I click online it says that it cannot find my booking. Even when I enter ticket number, it dos not recognize it. How can I do it. They switch a 74A for a 77A intially planned. Is that a reason and should I wait till airport? No fun with a big family trying to sit together (the old 77A seats are bad and apart on 74A). Cannot reach CX.

When they do a short notice switch they often lock out the online checkin for that flight. If you are all on the same PNR then I guess CX will do the sensible thing and sit you together. If not then you need to get CX on the phone somehow or get to the airport as early as possible. The toll-free number for the e-service centre from Indonesia is: 001 803 852 2212 which should work from any fixed line and maybe from some mobiles.

Thanks Christep, very clear and useful as usual.