Central Locking Problems

On my VW Golf Mk4 i have a slight problem with the central locking.

I can lock and unlock the car using the key, everything OK. When I lock the car from the switch inside, the pax (front) door locks and then unlocks itself straight away.

I have pluged it into VagCom and get the following error message -

Address 46: Central Conv. Labels: 1J0-959-799.LBL
Part No: 1J0 959 799 Q
Component: 4C Zentral-SG Komf. 0001
Coding: 04097
Shop #: WSC 00028
Part No: 1J2959802C
Component: 4C Tõrsteuerger. FS0001r
Part No: 1J2959801D
Component: 4C Tõrsteuerger. BF0001r
Part No: 1J4959811C
Component: 4C Tõrsteuerger. HL0001r
Part No: 1J4959812C
Component: 4U Tõrsteuerger. HR0001H
1 Fault Found:
00929 - Locking Module for Central Locking; Front Passenger Side (F221)
27-00 - Implausible Signal

I have changed the locking module and it makes no difference I still have the same problem. I have now changed the central locking control box with various different boxs (about 6 with different colour codes) and also the switch itself. None of this has worked.

Has anybody had/know how to fix this problem?? or any ideas???

any comments would be great as i am running out of hair to pull out!!!!!