API: Insert Task returns error 4600 with EXAMPLE DATA

API: Insert Task returns error 4600 with EXAMPLE DATA

I trying to insert new task as described on this page: https://www.zoho.com/crm/help/api/insertrecords.html#Tasks

Method: POST
URL: https://crm.zoho.com/crm/private/xml/Tasks/insertRecords
DATA:

  1. authtoken=MyAuthToken
  2. &scope=crmapi
  3. &newFormat=1
  4. &xmlData=
  5. <Tasks>
  6. <row no="1">
  7. <FL val="Subject">Call</FL>
  8. <FL val="Due Date">2009-04-20</FL>
  9. <FL val="Status">Deferred</FL>
  10. <FL val="CONTACTID">2000000017017</FL>
  11. </row>
  12. </Tasks>

Server response:
  1. <?xml version="1.0" encoding="UTF-8" ?>
  2. <response uri="/crm/private/xml/Tasks/insertRecords"><error><code>4600</code><message>Unable to process your request. Please verify if the name
  3. and value is appropriate for the "xmlData" parameter.</message></error></response>
It is sample data from your documentation. What's wrong with this request?