Bad Request from CIM

[Wstar]

I've searched a while for a awnser or hint to my problem.  Whenever I send a request using CIM and CURL,  I get a Bad Request error back.

The request Im sending is as follows (Merchant info X'ed out).

<?xml version="1.0" encoding="UTF-8"?>
<createCustomerProfileRequest xmlns="AnetApi/xml/v1/schema/AnetApiSchema.xsd">
 <merchantAuthentication>
  <name>XXXXXXXXXX</name>
  <transactionKey>XXXXXXXXXX</transactionKey>
 </merchantAuthentication>
 <profile>
  <merchantCustomerId>1</merchantCustomerId>
  <description>Jerrod Davenport</description>
  <email>1@gmail.com</email>
  <paymentProfiles>
   <customerType>individual</customerType>
   <payment>
    <creditCard>
     <cardNumber>3451562436918418</cardNumber>
     <expirationDate>2021-10</expirationDate>
    </creditCard>
   </payment>
  </paymentProfiles>
 </profile>
 <validationMode>none</validationMode>
</createCustomerProfileRequest>

My CURL code

$curl_request = curl_init();
curl_setopt($curl_request, CURLOPT_URL, "https://apitest.authorize.net/xml/v1/request.api");
curl_setopt($curl_request, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_request, CURLOPT_HTTPHEADER, Array("Content-Type: text/xml"));
curl_setopt($curl_request, CURLOPT_HEADER, 0);
curl_setopt($curl_request, CURLOPT_POSTFIELDS, $xml);
curl_setopt($curl_request, CURLOPT_POST, 1);
curl_setopt($curl_request, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($curl_request, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl_request, CURLOPT_CAINFO, '/URL_PATH/authroize/ssl/cert.pem');
$curl_response = curl_exec($curl_request);
curl_close($curl_request);

I've tried turning verify host to true and false.  No luck.  Tried several pem files which where linked on these forums.  

The esacted response I get is:

Bad Request

Your browser sent a request that this server could not understand.

Reference #7.d5600c50.1459784729.2100bd1)

[Wstar · Accepted solution]

My bad, the XML writer function I was using was empty.  Problem solved :)