[POMOC]Error

CMD:editv(playerid, params[])
{
	if(PlayerInfo < 1337) return SendClientMessage(playerid, COLOR_RED, "");
	if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
	{
		new id = GetVehicleID(GetPlayerVehicleID(playerid));
		if(!IsValidVehicle(id)) return SendClientMessage(playerid, COLOR_RED, "This is not a dynamic vehicle!");
		SetPVarInt(playerid, "DialogValue1", id);
		ShowDialog(playerid, DIALOG_EDITVEHICLE);
		return 1;
	}
	new vehicleid;
	if(sscanf(params, "d", vehicleid)) return SendClientMessage(playerid, COLOR_GREY, "USAGE: /editv ");
	if(!IsValidVehicle(vehicleid)) return SendClientMessage(playerid, COLOR_RED, "Invalid vehicleid!");
	SetPVarInt(playerid, "DialogValue1", vehicleid);
	ShowDialog(playerid, DIALOG_EDITVEHICLE);
	return 1;
}

C:\Users\pera\Desktop\Global Warming\gamemodes\GW.pwn(2532) : error 017: undefined symbol "ShowDialog"
C:\Users\pera\Desktop\Global Warming\gamemodes\GW.pwn(2539) : error 017: undefined symbol "ShowDialog"

CMD:editv(playerid, params[])
{
	if(PlayerInfo < 1337) return SendClientMessage(playerid, COLOR_RED, "");
	if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
	{
		new id = GetVehicleID(GetPlayerVehicleID(playerid));
		if(!IsValidVehicle(id)) return SendClientMessage(playerid, COLOR_RED, "This is not a dynamic vehicle!");
		SetPVarInt(playerid, "DialogValue1", id);
		ShowPlayerDialog(playerid, DIALOG_EDITVEHICLE);
		return 1;
	}
	new vehicleid;
	if(sscanf(params, "d", vehicleid)) return SendClientMessage(playerid, COLOR_GREY, "USAGE: /editv ");
	if(!IsValidVehicle(vehicleid)) return SendClientMessage(playerid, COLOR_RED, "Invalid vehicleid!");
	SetPVarInt(playerid, "DialogValue1", vehicleid);
	ShowPlayerDialog(playerid, DIALOG_EDITVEHICLE);
	return 1;
}