ZP 5.0.8 Помогите с зомби классами

#include <amxmodx>
#include <fakemeta>
#include <zombieplague>

#define heal_sound		"heal.wav"

new const zclass_name[] = "Heal"
new const zclass_info[] = "Zombie"
new const zclass_model[] = "heal"
new const zclass_clawmodel[] = "v_heal_knife.mdl"
const zclass_health = 4500
const zclass_speed = 250
const Float:zclass_gravity = 0.8
const Float:zclass_knockback = 0.0

new g_zclass_heal;
new Float:last_use[33];

public plugin_init()
{
	register_plugin("[ZP] Zombie Class: Heal Zombie", "0.1", "WPMG Team")
	register_clcmd("drop", "use_skill")
}

public plugin_precache()
{
	g_zclass_heal = zp_register_zombie_class(zclass_name, zclass_info, zclass_model, zclass_clawmodel, zclass_health, zclass_speed, zclass_gravity, zclass_knockback)

	precache_sound(heal_sound)
}

public zp_user_infected_post(id, infector)
{
	if(zp_get_user_zombie_class(id) == g_zclass_heal)
	{
		client_printcolor(id, "^4[ZP] ^1Press ^4^"G^" ^1for cure all your health.")
		last_use[id] = 0.0
	}
}

public use_skill(id)
{
	if(is_user_alive(id) && !zp_get_user_nemesis(id) && zp_get_user_zombie(id) && (zp_get_user_zombie_class(id) == g_zclass_heal))
	{
		if((pev(id, pev_health) < float(zp_get_zombie_maxhealth(id))) && (last_use[id] + 20.0 <= get_gametime()))
		{
			last_use[id] = get_gametime();

			set_pev(id, pev_health, float(zp_get_zombie_maxhealth(id)))
			emit_sound(id, CHAN_ITEM, heal_sound, 1.0, ATTN_NORM, 0, PITCH_NORM)

			message_begin(MSG_ONE_UNRELIABLE, get_user_msgid("ScreenFade"), { 0, 0, 0 }, id)
			write_short(1<<10)
			write_short(1<<12)
			write_short(0x0000) 
			write_byte(50) 
			write_byte(150)	
			write_byte(50) 
			write_byte(200)
			message_end()

			return PLUGIN_HANDLED;
		}
	}
	return PLUGIN_CONTINUE;
}

stock client_printcolor(const id, const input[], any:...)
{
	new iCount = 1, iPlayers[32]
	static szMsg[191]

	vformat(szMsg, charsmax(szMsg), input, 3)
	replace_all(szMsg, 190, "/g", "^4")
	replace_all(szMsg, 190, "/y", "^1")
	replace_all(szMsg, 190, "/t", "^3")
	replace_all(szMsg, 190, "/w", "^0")

	if(id) iPlayers[0] = id
	else get_players(iPlayers, iCount, "ch")

	for(new i = 0; i < iCount; i++)
	{
		if(is_user_connected(iPlayers[i]))
		{
			message_begin(MSG_ONE_UNRELIABLE, get_user_msgid("SayText"), _, iPlayers[i])
			write_byte(iPlayers[i])
			write_string(szMsg)
			message_end()
		}
	}
}