Locking issue?

Hey peeps, i hope you can help. I have a 2000 plate Seat Arosa. I know this isn't really skoda related, but hopefully the locking system is similar. Last night, I came home and went to lock my car as normal from the button on the key. I have an unlock button and a lock button. The lock button flashed, but the car did not lock. I decided maybe it was a dodgy connection and tried again, but no luck. So I pressed the unlock button and the car flashed its lights and attempted to unlock all the locks (as it was already unlocked) I then went and put the key in the lock and the central locking didn't work so I have had to lock all the doors and boot manually....But if I press the unlock button on the remote, or turn the key to unlock in the door lock, everything unlocks...Whats going on?? Any one offer me any advice?