Mail send fra form

jeg ved ikke lige helt hvad der går galt men det virker ikke..

her er min form på en html side... (mail.htm)
<FORM ACTION="/zerocontrol/mail.php" METHOD="post" enctype="text/plain">
<INPUT ID="box" NAME="name" TYPE="text" VALUE=""><BR>
<INPUT ID="box" NAME="epost" TYPE="text" VALUE=""><BR>
<INPUT ID="box" NAME="topic" TYPE="text" VALUE=""><BR>
<textarea name="msg" rows="6" ID="box-comment"></textarea><BR><BR>
<INPUT ID="button" TYPE="submit" VALUE="Send">&nbsp;<INPUT ID="button" TYPE="reset" VALUE="Reset">
</FORM>

Her er mit php side (mail.php)
<?php
#vaiabler til de forskellige inputs
$mail = "usse@ofir.dk";
$name = $_REQUEST["name"];
$epost = $_REQUEST["epost"];
$topic = $_REQUEST["topic"];
$msg = $_REQUEST["msg"];

#Sender mail her!
mail($mail, $topic, $msg, "From: $name $epost");

#Hvis mail er send skrives det her
echo "The mail have been successfully send, to $mail"
?>