Additional variables in php form

still doesnt work…when i uncomment this line:

//$message = $_POST["message"];

and comment out the other three message lines it works fine.

what am i doing wrong?

 <?php

$sendTo = "[email protected]";
$subject = "twm contact form";

// header information not including sendTo and Subject
// these all go in one variable.  First, include From:
$headers = "From: " . $_POST["name"];
$headers .= "<" . $_POST["email"] .">
";

// next include a Reply-To:
$headers .= "Reply-To: " . $_POST["email"];

// now we can add the content of the message to a body variable
//$message = $_POST["message"];
$message_ =_ $_POST["message"] ."
";
$message_.=_$_POST["company"] ."
";
$message_.= $_POST["phone"] ."
"; 

// once the variables have been defined, they can be included
// in the mail function call which will send you an email
mail($sendTo, $subject, $message, $headers);
?>