Door lock Jammed...
 

I want to unlock the car's door with the key but I couldn't do that. I tried it again and again. Even that I was using the right key. So I go to the passenger door and unlock it just fine. The lock and unlock button works on both doors only it locks and unlocks the passenger side door only. But the driver side dook is going to jammed and never open with key or from insider.

What i have to do in this situation....?

Counts on the kind of secure. A keyed entry lock needs, when locked, a key to operate; if you have such a key, it should work. A privacy secure has on the out-of-doors a little hole, in which a thin object such as a Q-tip or unfolded paper clip can be inserted to trip the mechanism.