Pawn.CMD doesn't return command arguments

[Dmitry]

Hello. I am coding for sa-mp for 5 days. But I can't find same issues in internet. So, my code is in filterscript:

#include <a_samp>
#include <mxINI>
#define FILTERSCRIPT
#include <Pawn.CMD>
#include <colors>
#include "cmd_flags"

cmd:a(playerid, args[])
{
	printf("args count: %d", sizeof(args));
	return 1;
}

public OnPlayerCommandReceived(playerid, cmd[], params[], flags)
{
	new pname[30];
	GetPlayerName(playerid, pname, 30);
	new fname[50];
	format(fname, 50, "users/%s.ini", pname);
	new inif = ini_openFile(fname);

	new pRang;
	ini_getInteger(inif, "adminLevel", pRang);
	ini_closeFile(inif);

	if (flags > pRang)
	{
		SendClientMessage(playerid, RED, "You have no permissions for access this command");
		return 0;
	}

  return 1;
}

public OnPlayerCommandPerformed(playerid, cmd[], params[], result, flags)
{
  if (result == -1)
  {
    SendClientMessage(playerid, RED, "SERVER: Unknown command.");

    return 0;
  }

  return 1;
}

public OnFilterScriptInit()
{
  return 1;
}

public OnFilterScriptExit()
{
  return 1;
}

and when I type /a 1 2 3 in chat, my console says args count: 0.

so sorry if this is dumb question but I tired of finding solve.