Xara picasso central locking keeps unlocking

[ADH]

Hi my problem is when I lock my doors they instantly unlocks all the doors but not the boot that stays locked.All the locks sound like they are working. I have been round each door in turn and all seem to be engaging. I'm out of ideas now. Any help would be great.TIA

[CitroJim]

Does the dash display indicate any doors being open? And does the dash correctly display doors open when they actually are?

[ADH]

Hi no the dash says everything ok. the strange thing is the boot locks. I thought id cured it as been ok for a couple of weeks but today done it again.