PHP, cURL, and Roblox. cURL continues to redirect to error page - php

Question

I am making an HTTP API for use in Roblox. I am using PHP and cURL to do so.
However, there is one method on which I am stuck. That is sending messages through roblox in PHP. I have captured the message sending request using Fiddler. I have put all the headers into my cURL request.
I also am fetching the .ROBLOSECURITY cookie, the X-CSRF Token, and the RBXSessionTracker and __RequestVerification cookies.
Here is the messaging code for those of you want to help:
$RecipientId=$_POST['RecipientId'];
$Subject=$_POST['Subject'];
$Message=$_POST['Message'];
$AuthCookie=decodeJSON($_POST['Login']);
$AuthCookie=$AuthCookie[0];
$TokenCurl=curl_init('roblox.com/build/upload?groupId=1');
curl_setopt_array($TokenCurl,array(
CURLOPT_HTTPGET => 1,
CURLOPT_FRESH_CONNECT => 1,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_HEADER => 1,
CURLOPT_HTTPHEADER => array('Cookie: .ROBLOSECURITY='.$AuthCookie),
));
$TokenResponse=curl_exec($TokenCurl);
$TokenHeaderSize=curl_getinfo($TokenCurl,CURLINFO_HEADER_SIZE);
$TokenCurlError=curl_error($TokenCurl);
$Cookies=GetCookies(substr($TokenResponse,0,$TokenHeaderSize));
$SessionTracker=$Cookies['RBXSessionTracker'];
$RequestVerification=$Cookies['__RequestVerificationToken'];
$AuthCookie='.ROBLOSECURITY='.$AuthCookie.'; RBXSessionTracker='.$SessionTracker.'; __RequestVerificationToken='.$RequestVerification.';';
curl_close($TokenCurl);
if($TokenCurlError!==''){
die($TokenCurlError);
};
$Cache=time();
preg_match("\`<script\stype=\"text/javascript\">\s*?Roblox\.XsrfToken\.setToken\('(.*?)'\);\s*?</script>\`",$TokenResponse,$Matches);
$Token=$Matches[1];
if(empty($Token)){
die("Could not get X-CSRF Token");
};
$PostData=json_encode(array(subject=>$Subject,body=>$Message,recipientid=>$RecipientId,cacheBuster=>$Cache));
$Curl=curl_init('roblox.com/messages/send');
curl_setopt_array($Curl,array(
CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0',
CURLOPT_POST => 1,
CURLOPT_FRESH_CONNECT => 1,
CURLOPT_HEADER => 1,
CURLOPT_POSTFIELDS => $PostData,
CURLOPT_HTTPHEADER => array('Content-Length: '.strlen($PostData),'X-CSRF-TOKEN: '.$Token,'Referer: www.roblox.com/messages/compose?recipientId='.$RecipientId,'X-Requested-With: XMLHttpRequest','Cookie: '.$AuthCookie,'Accept: application/json, text/javascript, */*; q=0.01','Accept-Language: en-US,en;q=0.5','Accept-Encoding: gzip, deflate','Connection: keep-alive','Pragma: no-cache','Cache-Control: no-cache'),
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_VERBOSE => 1
));
$ResponseBody=curl_exec($Curl);
echo $ResponseBody;
$HTTPResponseCode=curl_getinfo($Curl,CURLINFO_HTTP_CODE);
$HTTPHeaderSize=curl_getinfo($Curl,CURLINFO_HEADER_SIZE);
$ResponseHeader=substr($ResponseBody,0,$HTTPHeaderSize);
$CurlError=curl_error($Curl);
curl_close($Curl);
if($CurlError!==''){
die($CurlError);
};
$MessageResult=decodeJSON(substr($ResponseBody,$HTTPHeaderSize));
echo json_encode(array(Message=>$MessageResult['message']));
I removed the 'http://' from the links because of reputation.
Everything works, it just will not send the message. Does anyone know what exactly you need to send a message?