How To Access Password Protected File Via Curl

I've got a file I want to access via cURL that is within a password protected directory.

I've tried sending:

Code:
$headers = array(
"HTTP_AUTH_LOGIN: admin3e",
"HTTP_AUTH_PASSWD: opensesame",
"Content-Type: text/html"
);

curl_setopt($curl, CUROPT_HTTPHEADER, &$headers);
(insecure)

and:

Code:
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_USERPWD, '[user]:[pass]');
but I can't figure out how to get past the login:

Authorization Required

This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required.
Apache/2.0.52 (CentOS) Server at ****** Port 80