Central lock malfunction?

Hey everyone, my Opel Astra doesn't open all doors 3xcept for the driver and the boot ..the problem started when i tried unlocking it and it kept on locking and unlocking ..until I decided to open it manually with key,proceeded with my trip but with the other doors unusable as they won't open...even when the door locks are on unlock...still they won't open..except for the driver door and boot. Please help