Hi! I mange to make myself more problem. yesterday i was working on the locking mechanism on both doors.
The car is : Opel Omega 1995, 2,5 V6
Drivers seat is on left on my car. On drivers side, is missing the two small pieces, (one is round metallic and you see it when remove the door card, and the other one is activating mechanically the doors) what activate the switch, like in the image below.

Now the problem: before yesterday i could lock/unlock the car with the key from the right door (passenger side on my car).
Now i can lock/unlock the car just if i push/pull the motor from drivers side, is not locking any more with the key, on any of the side.
From the motor action, is locking/unlocking all doors. The fob is not working since i buy the car.
Where to search? what it could be the problem.
The fuse 20 is ok, is there any other fuse to check?
PS: yesterday i was using on the mechanism a spray similar to w40, it is possible, if he entered into the contacts, to create this problem?
PS2: i tried to use the search option, but i didn't saw any similar problem.