Script Entity Object fade in - help please

[jssjr90]

Well I want to have these 2 statues fade in or appear upon walking into a trigger area. The entity im using is "deformedman.ent" from the statues section. I have 2 of them behind a wall creating a shadow only illusion. But I want to fade them in when walking into a trigger. The problem is that the statue entity does not have a "Player Interact Call Back" function on the entity tab. So can someone help me on this script. This is what I have but it fails.

void OnStart()
{
AddEntityCollideCallback("Player" , "Shadowman" , "Shadowmovefunc" , true, 0);
}

//Shadow move func
void Shadowmovefunc(string &in asParent, string &in asChild, int alState)
{
SetPropActiveAndFade("ShadowmanA", "", 5);
SetPropActiveAndFade("ShadowmanB", "", 5);
}

The error I get that pops up is no matching signatures.

Help would be greatly appreciated.