API testing - How to pass date and time

[Anonymous]

Hi- i am trying to test API using SOAP UI tool. but below error.

how to pass <requestTimestamp>2014-05-15T00:00:00-00:00</requestTimestamp>

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">

   <SOAP-ENV:Body>

      <SOAP-ENV:Fault>

         <faultcode>SOAP-ENV:Client</faultcode>

         <faultstring>20014 - Authentication failed</faultstring>

         <detail>

            <ns1:serviceException xmlns:ns1="http://www.marketo.com/mktows/">

               <name>mktServiceException</name>

               <message>Authentication failed (20014)</message>

               <code>20014</code>

            </ns1:serviceException>

         </detail>

      </SOAP-ENV:Fault>

   </SOAP-ENV:Body>

</SOAP-ENV:Envelope>

[Anonymous]

Looks like you aren't providing any authentication or your authentication is incorrect.
Have you tried following the steps at: http://developers.marketo.com/documentation/soap/signature-algorithm/