Zoho remote show api wont return any response

Zoho remote show api wont return any response

Hey. I have big problem. I have a local server nad trying to post a file via PHP and curl but cant get any response. 
Does it need that my server will be ssl secured? I only want to display presentation files over web without editing.  

  1. <?php

    $fields = array();
    $fields["content"] = @"/files/Sample.odp";
    $fields["apikey"] =" my secret api key :D";
    $fields["output"] ="url";
    $fields["mode"] ="normaledit";
    $fields["filename"] = 'Sample.odp';
    $fields["lang"] ="en";
    $fields["id"] ="12345678";
    $fields["format"] ='odp';
    $fields["saveurl"] ='https://www.uploader.com/save.php';

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'https://show.zoho.com/remotedoc.im');
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
    curl_setopt($ch, CURLOPT_VERBOSE,  1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HEADER, true);
    $page = curl_exec($ch);

    echo $page;
    curl_close($ch);
?>