Not able to form xpath using mule expression for given xml

Am trying to read data from xml using an expression in mule but am getting the following exception java.lang.RuntimeException: org.mule.api.MuleRuntimeException: Failed to evaluate XPath expression: "//*[xpath:local-name()="oa:ID"]/text()"

The flow is given below

<flow name="testauditFlow1" doc:name="testauditFlow1">
        <http:inbound-endpoint exchange-pattern="one-way"
            host="localhost" port="8086" path="test" doc:name="HTTP"/>
            doc:name="DOM to XML" />
        <expression-component doc:name="Expression"><![CDATA[#[xpath('//*[xpath:local-name()="ID"]/text()').text]]]></expression-component>
        <logger level="INFO" doc:name="Logger" />
    </flow>

The xml i used is given below

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://ift.tt/sVJIaE" xmlns:soapenc="http://ift.tt/wEYywg" xmlns:xsd="http://ift.tt/tphNwY" xmlns:xsi="http://ift.tt/ra1lAU">
   <soapenv:Header/>
   <soapenv:Body>
      <_ord:ProcessOrder releaseID="9.0" versionID="7.0.0.0" xmlns:_ord="http://ift.tt/1I4cwli" xmlns:_wcf="http://ift.tt/1CYEnFd" xmlns:oa="http://ift.tt/1I4cx8X">
         <oa:ApplicationArea xsi:type="_wcf:ApplicationAreaType">
            <oa:CreationDateTime>2012-08-07T13:25:01.337Z</oa:CreationDateTime>
            <oa:ID>1234566</oa:ID>
            <_wcf:BusinessContext/>
         </oa:ApplicationArea>
      </_ord:ProcessOrder>
   </soapenv:Body>
</soapenv:Envelope>