[MDL ED] AMFP enemies run through player

[serbusfish]

I have imported all the AMFP enemies into my CS, and although they all patrol as they should when they spot the player and attack they end up running 'through' the player and instead attack things around them. If the player stands perfectly still 'inside' the enemy it will continue attacking around them without hitting them.

I am assuming (hoping) this can be fixed in the model editor? Is there a setting which can be altered to sort this out, as it kinda ruins immersion when the enemy you're supposed to be scared of passes straight through you...