Novice problems reading xml using SQL OPENXML

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XML

SQL-Server-2008R2

OpenXML

Hi,
I have some XML stored in a single column of a table. I have written the following SQL query but get nothing back. Can somebody a bro xml novice in a bind out with some suggestions?

<ClinicalDocument xmlns="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sdtc="urn:hl7-org:sdtc">
  <realmCode code="US" />
  <typeId root="2.16.840.1.113883.1.3" extension="POCD_HD000040" />
  <templateId root="2.16.840.1.113883.10.20.22.1.1" />
  <templateId root="2.16.840.1.113883.10.20.22.1.2" />
  <id root="3d0b09e1-2014-f0a8-05cf-001A64958C30" />
  <code code="34133-9" codeSystem="2.16.840.1.113883.6.1" displayName="Summarization of Episode Note" />
  <title>Ambulatory Summary</title>
</ClinicalDocument>

DECLARE @XMLDoc AS XML, @hDoc AS INT, @SQL NVARCHAR(MAX)

SELECT @XMLDoc = XMLData FROM XMLwithOpenXML

EXEC sp_xml_preparedocument @hDoc OUTPUT, @XMLDoc, '<ClinicalDocument xmlns="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sdtc="urn:hl7-org:sdtc" />'

SELECT Title
FROM OPENXML(@hDoc, '/sdtc:ROOT/sdtc:ClinicalDocument',1)
WITH
(
Title varchar(50) 'sdtc:title'
)

EXEC sp_xml_removedocument @hDoc