Why doesn't this work?

[Storfigge]

You need to tell us the error.

The first thing that comes to mind is that you're missing "void OnStart()" in your first function.

void OnStart()
{
AddEntityCollideCallback("Player", "Sleep", "activate_sleep", true, 1);
}

Oops i apologize i did actually add void OnStart() just missed to put that in the first question. The error is

: INFO : Compiling void activate_sleep(string&in, string&in, int)

: ERR : Expected ')' or ',' This one is for the AddTimer