Trigger_hurt

Im working on a prop hunt map that has area that will kill players if they go in it. The problem is that props won’t take any damage.
See the settings of the trigger_hurt: https://drive.google.com/file/d/0Bzof_AQG9NDISWhNTG1pQkt2Z2M/view?usp=sharing
Is there a way to hurt props? (I mean the players in the gamemode)