I have a subtab created in a custom record and when i call that in the custom form xml the fields show but the tab doesn't show up.

<tabs>
    <tab>
      <id>[scriptid=customrecord_dc_wo.custtab_dc_wo_equipment]</id>
      <label>Equipment</label>
      <visible>T</visible>
      <fieldGroups>
        <defaultFieldGroup>
          <fields position="MIDDLE">