This wuldn\'t work:

  if ($version < 5.8) { 
    echo -a Your mIRC is too old, IRCop only works with mIRC 5.9 or later.
    unload -rs $script
  }

Use This:

  if ($version < 5.9) { 
    echo -a Your mIRC is too old, IRCop only works with mIRC 5.9 or later.
    unload -rs $script
  }