Episode 1: RPG rebels not attacking!

[NamelessHenchman]

So, my friend has made a couple of HL2 maps for episode 1 but he can't use rebel rpg guys as enemies, because they don't fire at the player when he runs the map in Ep.1 . However, when I run those maps in HL2 vanilla, they work perfectly fine. Why don't the rpg guys work in Ep. 1 like they did in hl2 ? Is it a bug or an intentional feature by Valve?
Does anybody happen to know why this happens? Help is appreciated.

 

[Full Life 1?]

The same thing happens in the latest version of Garrys mod as well. Must be a bug with the new source engine. No idea why, they seem to work in ep1 itself, mabye you need an info_target telling it where to fire or something. Try making them on the same level as the player, as this seems to work.