SOAP get_activity API gives blank response

Content

Hi,

I am trying to hit get_activity with a valid activity id but still it gives blank response.

Request:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/&quot; xmlns:urn="urn:toa:activity">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:get_activity>
         <user>
            <now>2016-09-29T12:45:31+05:30</now>
            <login>soap</login>
            <company>*******</company>
            <auth_string>7a2f0b4d1d9a595f2e8b2f2e7dbb1d45c3840ad401567b7cdf3cca545fffa3dc</auth_string>
         </user>
         <activity_id>591</activity_id>
      </urn:get_activity>
   </soapenv:Body>
</soapenv:Envelope>

 

Response:

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