Central Locking Problem corsa c design 04?

My car works in the ignition it turns the car on and off but the key open and close buttons dont work so i have to put the key in the door. Normally u would turn it open twice to open all doors and same if u wanted to lock. Well now i turn it once and it locks all doors but when i goto open the doors it only wants to open the drivers side door and it doesnt open anything else so a cant even put petrol in because it wont even open the petrol door. Anyone know a solution?

Chris Paterson
April 2010