why does this script not work

[ideadhotty]

i dont understand why its not working and is crashing or not letting me get in to the game

#include maps\mp\_utility;
#include common_scripts\utility;
#include maps\mp\zombies\_zm;
#include maps\mp\zombies\_zm_utility;

init()
{
	level.clientid = 0;
	level.perk_purchase_limit = 9;
	level thread onplayerconnect();
}

onplayerconnect()
{
	for ( ;; )
	{
		level waittill( "connecting", player );
		player.clientid = level.clientid;
		player thread onplayerspawned();
		level.clientid++;
	}
}

onplayerspawned()
{
	level endon( "game_ended" );
        self endon( "disconnect" );
	
	for(;;)
	{
		self welcome();
	}
}

welcome()
{
    self waittill( "spawned_player" );
    self maps/mp/zombies/_zm_perks::give_perk( "specialty_armorvest" );
    wait 7;
    self iprintln("^2" +self.name + "^7 , your perk limit has been removed");
}