Unable to use soap API

[Anonymous]

I am getting below error while trying to access SOAP API.

<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]

I am using SoapUI to test

[Anonymous]

Have you tried using sample code on SOAP API docs? I would recommend grabbing sample code from there, client id & secret from Admin panel in the UI, and trying that. 

http://developers.marketo.com/documentation/soap/deletemobjects/

[Anonymous]

20014 is often thrown when the the authentication resources to an invalid endpoint and/or the server timestamp is invalid.

Troubleshooting SOAP API Error Code 20014 - Authentication failed