Fails to resolve child DOIs

[jure]

For example: http://www.crossref.org/guestquery?queryType=doi&restype=unixref&doi=10.7554/eLife.01119.001&doi_search=Search

<?xml version="1.0" encoding="UTF-8"?>
<doi_records>
  <doi_record key="key" owner="10.7554" timestamp="2013-12-24 11:13:25">
    <crossref>
      <sa_component parent_doi="10.7554/eLife.01119">
        <component_list>
          <component parent_relation="isPartOf" reg-agency="crossref">
            <doi_data>
              <doi>10.7554/eLife.01119.001</doi>
              <resource>http://elife.elifesciences.org/lookup/doi/10.7554/eLife.01119.001</resource>
            </doi_data>
          </component>
        </component_list>
      </sa_component>
    </crossref>
  </doi_record>
</doi_records>