Door won't unlock/open

[Pavel14]

Picked up our "new" 1994 Suzuki 4dr 5 spd Sidekick yesterday. Seems like a delightful vehicle - runs well. The front passenger door wouldn't lock - with the key and the door button wouldn't go down. Took the internal panel off, unclipped the rods and removed the locking mechanism. Lubricated it carefully and it seemed to work again.
Put it all together and closed the door. Now it won't open with the key or internal level and the door button will not come up!
Any suggestions would be appreciated. Be kind please... Pavel.