How to parse complex xml

Hi all please let me know how to parse the following xml string. I have tried many methods but no response please give me some ideas asap.

thanks

String responce ="
    <?xml version="1.0" encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="http://ift.tt/sVJIaE" xmlns:xsd="http://ift.tt/tphNwY" xmlns:xsi="http://ift.tt/ra1lAU">
     <soapenv:Body>
      <ns1:loginVerificationResponse soapenv:encodingStyle="http://ift.tt/wEYywg" xmlns:ns1="ecgw">
       <loginVerificationReturn xsi:type="ns2:Map" xmlns:ns2="http://ift.tt/1a5EBb7">
        <item xmlns:soapenc="http://ift.tt/wEYywg">
         <key xsi:type="soapenc:string">CLIENTID</key>
         <value xsi:type="soapenc:integer">569604</value>
        </item>
        <item>
         <key xsi:type="soapenc:string" xmlns:soapenc="http://ift.tt/wEYywg">AUTHORISED</key>
         <value xsi:type="soapenc:string" xmlns:soapenc="http://ift.tt/wEYywg">TRUE</value>
        </item>
       </loginVerificationReturn>
      </ns1:loginVerificationResponse>
     </soapenv:Body>
    </soapenv:Envelope>"