Problem 4600. <code>4600</code> <message>Unable to process your request. Please verify if the name and value is appropriate for the "scope" parameter.</message> </error>

Problem 4600. <code>4600</code> <message>Unable to process your request. Please verify if the name and value is appropriate for the "scope" parameter.</message> </error>

Hello everyone! 

Can you help me with my API call? I can't understand what is wrong with it.

I am updating CRM contacts record using the following url:
https://crm.zoho.com/crm/private/xml/Contacts/updateRecords?authtoken=MyToken&scope=crmapi
&newFormat=1&id=3421207000000728070&xmlData=<Contacts><row no="1"><fieldlabel value="First Name"><![CDATA[Nick]]></fieldlabel></row></Contacts>

But I am getting the following error message everytime:
<response uri="/crm/private/xml/Contacts/updateRecords">
    <error>
        <code>4600</code>
        <message>Unable to process your request. Please verify if the name and value is appropriate for the "scope" parameter.</message>
    </error>
</response>