how do i get my central locking working on my 51 zafira club 1.6?

hi my central locking wasnt working and i tried tims top tip and it worked it lock both front and boot locked but didnt lock rear doors so i then checked each fuse incase it was that and that then caused the central locking to stop working again on all doors so tryed the trick again and it dindt work a second time anyone now why this has happened