Passenger side door lock actuator

I just replaced my passenger side actuator in my and everything seems to be hooked correctly and does what it is supposed to do. But when I use the handle on the in and outside to open the door the action on the handles doesn't seem to be as smooth as the others especially on the inside handle. Is it possible that something was not hooked up right or could it just use some grease? I even took it out and put it back in to make sure all the connections were right.

I bought this particular actuator from auto parts warehouse.