Problem with MP4box

[Jamaika]

How to enter commands globaltags in MP4Box?
I can't use itags because I can't use the Enter and write in UTF-8. Can it do somehow with DOS?
Why don't players and MediaInfo show the metadata attachment in MP4Box?

<MetaBox>
  <BoxInfo Size="166" Type="meta"/>
  <FullBoxInfo Version="0" Flags="0x0"/>
  <HandlerBox Type="mdir" Name="GPAC mdir Handler" reserved1="0" reserved2="data:application/octet-string,000000000000000000000000">
    <BoxInfo Size="50" Type="hdlr"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
  </HandlerBox>
  <ItemLocationBox offset_size="0" length_size="4" base_offset_size="4">
    <BoxInfo Size="30" Type="iloc"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
    <ItemLocationEntry item_ID="1" data_reference_index="0" base_offset="806422" />
    <ItemExtentEntry extent_offset="0" extent_length="446082" />
  </ItemLocationBox>
  <ItemInfoBox>
    <BoxInfo Size="74" Type="iinf"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
    <ItemInfoEntryBox item_ID="1" item_protection_index="0" item_name="cover.png" content_type="image/png" content_encoding="">
      <BoxInfo Size="60" Type="infe"/>
      <FullBoxInfo Version="0" Flags="0x0"/>
    </ItemInfoEntryBox>
  </ItemInfoBox>
</MetaBox>

Edit: http://forum.doom9.org/showthread.php?t=94874&page=25