Pushing records from 3rd Party to Zoho CRM

Pushing records from 3rd Party to Zoho CRM

Could someone please provide me an example of how to post leads from a 3rd party to ZohoCRM via XML post?

I am using the following and getting an error (shown at bottom).

Post URL: 
https://crm.zoho.com/crm/private/xml/Leads/insertRecords?authtoken=AUTHORIZATIONTOKENGOESHERE&scope=crmapi


Post Headers: 
xml version="1.0" encoding="utf-8

XML: 
<Leads>
<row no="1">
<FL val="First Name">#first_name#</FL>
<FL val="Last Name">#last_name#</FL>
<FL val="Email">#email_address#</FL>
</row>
</Leads>


Error: 
<?xml version="1.0" encoding="UTF-8" ?>
<response uri="/crm/private/xml/Leads/insertRecords"><error><code>4600</code><message>Unable to process your request. Please verify if the name and value is appropriate for the "xmlData" parameter.</message></error></response>