Today I noticed that my drivers side door lock was being difficult. The key would go in but it was like it needed to be lubed a little. So I sprayed a little wd 40 in the lock and continued to lock and unlock the doors with the key (not the fob), Then all of a sudden the central locking stopped working. It wont lock all the doors from the drivers or the passenger side and the lock button on the switch pack does nothing. Nor does pushing the lock manually down. When I put the key in and lock it, it only locks the door the key is in. The fuses are all good. No idea what to do. Need some help.