Central locking ?

Hi all,

If some one can help me to resotre the central locking for zafira 1.6 2000. The remote did work but then stoped i changed the battery it was fine but then it stoped again. Now i can only open the door with key and it will only open driver side thats and the boot dose not lock. any one to help me resorte remote locking as both key dose not open the locks with reomte, thank