[RajatPawar]

You can't use newkeys in a command. They are to be used in the OnPlayerKeyStateChange callback ONLY. You can just RETURN the command under that callback.

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys & KEY_FIRE)
    {
           // check other conditions, if he is in a car, etc..
           return cmd_tow(playerid);
    }
  return 1;
}