Reusing cookie in curl not working - php

Question

first time here, and I need help, please!
I have two functions that do different things. The first, only do a login in an external website, and its working fine. In the second fuction, I need to do a POST with the login saved from the first. I use the CURLOPT_COOKIEJAR and CURLOPT_COOKIEFILE with the same path in both functions, but when I print what I'm sending in each function with var_dump(curl_getinfo($ch)), the cookie only shows in the first one, and not in the second, causing a 401 Unauthorized Server as a result of the second function.
<?php
$cookie_path = dirname(__FILE__).'/cookie.txt';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $login_conf['login_url']);
curl_setopt($ch, CURLOPT_REFERER, $login_conf['referer_header']);
curl_setopt($ch, CURLOPT_POST, 1 );
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, TRUE );
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_path);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_path);
$html = curl_exec($ch);
?>
Thats basically the content of the login function, and this:
<?php
$cookie_path = dirname(__FILE__).'/cookie.txt';
$ch2 = curl_init();
curl_setopt($ch2, CURLOPT_URL, $purge_conf['request_url']);
curl_setopt($ch2, CURLOPT_REFERER, $refheader_submit);
curl_setopt($ch2, CURLOPT_POST, 1 );
curl_setopt($ch2, CURLOPT_POSTFIELDS, $query_purge);
curl_setopt($ch2, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch2, CURLOPT_HEADER, TRUE );
curl_setopt($ch2, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: '.strlen($query_purge))
);
curl_setopt($ch2, CURLINFO_HEADER_OUT, true);
curl_setopt($ch2, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch2, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch2, CURLOPT_COOKIEJAR, $cookie_path);
curl_setopt($ch2, CURLOPT_COOKIEFILE, $cookie_path);
$html_purge = curl_exec($ch2);
?>
Is the other one, that I need to sent a json post to other page, for witch I need to keep the login and cookie.
I dont know if I am doing something wrong, or if I am missing something.