Help, I don't know what I'm doing wrong, I put these capes and the characters can't equip them

WHAT WILL BE THE PROBLEM


XML used on the server:

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE list SYSTEM "item.dtd">

    <!-- Cloaks Godes of Destruction -->
<list>    
  <armor id="50005" name="Knight's Cloak">
    <set name="default_action" value="equip"/>
    <set name="bodypart" value="back"/>
    <set name="immediate_effect" value="1"/>
    <set name="material" value="cloth"/>
    <set name="enchantable" value="false"/>
    <set name="crystal_type" value="S84"/>
    <set name="icon" value="icon.vesper_cloack_i00"/>
    <set name="price" value="0"/>
    <set name="type" value="NONE"/>
    <set name="weight" value="220"/>
    <set name="is_dropable" value="false"/>
    <set name="is_sellable" value="false"/>
    <set name="is_depositable" value="false"/>
    <set name="is_destroyable" value="false"/>
    <set name="is_tradable" value="false"/>
    <cond msgId="2453">
    </cond>
    <equip>
      <slot id="BACK"/>
    </equip>
    <skills>
      <skill id="21243" level="1"/>
    </skills>
    <attributes>
      <attribute element="fire" value="10"/>
      <attribute element="water" value="20"/>
      <attribute element="wind" value="20"/>
      <attribute element="earth" value="10"/>
      <attribute element="holy" value="20"/>
      <attribute element="unholy" value="10"/>
    </attributes>
    <for>
      <add stat="pDef" order="0x10" value="25"/>
      <encantar estadística="pDef" orden="0x0C" valor="0"/>
      <encantar estadística="máxHp" orden="0x80" valor="0"/>        
</for>
</armadura>
</lista>

try //reload items and check for errors