Car doors not locking.

[Travisty FTT]

Recently I've been experiencing problems with three of my car's doors. They're no longer staying locked. Once I lock them with my remote or key, they lock, but as soon as I pull the handle up on my front driver's side or two rear doors, they unlock the doors.

I was just wondering if anyone had any idea of what is wrong or have had this happen to them as well. Is it something to do with some relay somewhere or would it be the individual door themselves? Cheers.