2005 Toyota RAV4 Door Locks issue using Remote

Hi,

I use remote to unloack the doors. All work fine except the Front Passenger side door lock. Sometimes it locks and unlocks and sometimes it doesn't. It's frustrating to make my pregnant wife stand outside in the cold weather till I seat in and unlock her side of door.

I click unlock for couple of times the lock struggles and closes halfway but it's not competely locked/Unlocked.

Please suggest. Thanks in Advance