I have managed to connect to the API successfully using authtoken. I see all the content as required, but I am not able to search the records based on the fields as suggested here.

Here is what my url looks like : 

https://support.zoho.com/api/xml/requests/getrecordsbysearch?authtoken=MyAUTHTOKEN&portal=MyPORTAL&department=MyDEPARTMENT&searchfield=Subject&searchvalue=Support

This is what is been returned, when I actually have ' Support' in my Subject fields

1. <response uri="/api/xml/requests/getrecordsbysearch">
   <error>

   <code> 4832 </code>

   <message> There is no data to show </message>

   </error>
   </response>

What have I missed?