PHP Problem Sending Mail with headers

I have a contact form that sends 2 mails one to the user and the other to the admin.

The email that is sent to the user has no problems, yet the other is not working and giving a success code.

Here is my code:

This is the config file (emails and contents removed):

$adminEmail = "*********@*****.com";
$adminSubj = "Admin Subject";

$userSubj = "User Subject";

////////////////////////////////////////////////////////
//DON`T EDIT BELOW THIS LINE
////////////////////////////////////////////////////////

$userName = $_GET['name'];
$userEmail = $_GET['email'];
$userPhone = $_GET['phone'];
$userMessage = $_GET['message'];

$adminHeaders = 'MIME-Version: 1.0' . "\r\n";
$adminHeaders .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";;
$adminHeaders .= "To: " . $adminEmail . "<" . $adminEmail . ">" . "\r\n";
$adminHeaders .= "From: " . $userName ."<" . $userEmail . ">" . "\r\n";

$userHeaders = 'MIME-Version: 1.0' . "\r\n";
$userHeaders .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$userHeaders .= "To: " . $userName . "<" . $userEmail . ">" . "\r\n";
$userHeaders .= "From: website <no-reply@website>" . "\r\n";

And this is the file that sends the mail:

include("config.php");

$userSendMessage = "Your Message:<br />
$userMessage<br /><br /><br />
We will get back you.
<br /><br />
Thanks
Website Team.

";

$adminSendMessage = "
$userName<br />
$userEmail<br />
$userPhone<br />
$userMessage";

$toUser = mail($userEmail,$userSubj,$userSendMessage,$userHeaders);
$toAdmin = mail($adminEmail,$adminSubj,$adminSendMessage,$adminHeaders);

if($toAdmin && $toUser)
echo 1;
else
echo 0;

I guess that the problem is in the $adminHeaders

$adminHeaders = 'MIME-Version: 1.0' . "\r\n";
$adminHeaders .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";;
$adminHeaders .= "To: " . $adminEmail . "<" . $adminEmail . ">" . "\r\n";
$adminHeaders .= "From: " . $userName ."<" . $userEmail . ">" . "\r\n";

when I use the headers as this it works:

$adminHeaders = 'MIME-Version: 1.0' . "\r\n";
$adminHeaders .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";;
$adminHeaders .= "To: " . $adminEmail . "<" . $adminEmail . ">" . "\r\n";
$adminHeaders .= "From: Someone <someEmail@someServer.com" . "\r\n";

Any idea how to send the mail to the admin by the user email?