Error while posting submission time stamp

[avina_pandith]

Hi,

I am trying to post submission timestamp at the time of student upload the document with following xml

<?xml version = "1.0" encoding = "UTF-8"?><imsx_POXEnvelopeRequest xmlns="http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0">  <imsx_POXHeader>    <imsx_POXRequestHeaderInfo>      <imsx_version>V1.0</imsx_version>      <imsx_messageIdentifier>999999123</imsx_messageIdentifier>    </imsx_POXRequestHeaderInfo>  </imsx_POXHeader>  <imsx_POXBody>    <replaceResultRequest>      <submissionDetails>        <!-- Added element -->        <submittedAt>          2017-04-16T18:54:36.736+00:00         </submittedAt>      </submissionDetails>      <resultRecord>        <sourcedGUID>          <sourcedId>3124567</sourcedId>        </sourcedGUID>        <result>          <resultScore>            <language>en</language>            <textString>null</textString>          </resultScore>        </result>      </resultRecord>    </replaceResultRequest>  </imsx_POXBody></imsx_POXEnvelopeRequest>

with grade passback, but i am getting following response, can any one help with this urgent

<?xml version="1.0" encoding="UTF-8"?>
<message_response>
<lti_message_type/>
<statusinfo>
<codemajor>Unsupported</codemajor>
<severity>Status</severity>
<codeminor>fullsuccess</codeminor>
</statusinfo>

</message_response>