Problem in insertion of contact

Problem in insertion of contact

Hello,
I am trying to insert data in zoho contact with my custom form created in html.But its not working 
Following is my code snippet. but it doesnt work for me 




$xml_data="<Contacts>
<row no='1'>
<FL val='First Name'>Scott</FL>
<FL val='Last Name'>James</FL>
<FL val='Email'> test@test.com</FL>
<FL val='Department'>CG</FL>
<FL val='Phone'>989898988</FL>
<FL val='Fax'>99999999</FL>
<FL val='Mobile'>99989989</FL>
<FL val='Assistant'>John</FL>
</row>
</Contacts>";  
$auth_token = 'e7d0fe51c2ed6f4b19e39ff8006266d1';  
$request_url = ' http://creator.zoho.com/api/xml/Leads/insertRecords?authtoken=' . $auth_token . '&scope=crmapi&xmlData=' . urlencode( $xml_data );
$curl = curl_init( $request_url ); 
curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $curl, CURLOPT_CONNECTTIMEOUT, 5 );  
$curl_response = curl_exec( $curl );
curl_close( $curl );   




Please help me.


Regards:
Pragnesh Patel