PHP Form tute edit question

Hello,
I have tried to edit the HTML/PHP contact form from the tutorial but it didnt work out.

Basically, i dont need the check boxes and radio buttons, but the 3 text fields that are already there and TWO drop down lists (there is one in the tutorial). I changed the code to this (and added of course one more list which i named drop_down2,and a $dropdown2 variable in the PHP file).

<?php
if(isset($_POST[‘submit’])) {

$to = my@myself.com;
$subject = “Form Tutorial”;
$name_field = $_POST[‘name’];
$email_field = $_POST[‘email’];
$message = $_POST[‘message’];
$dropdown = $_POST[‘drop_down’];
$dropdown2 = $_POST[‘drop_down2’]
$body = "From: $name_field
E-Mail: $email_field
Drop-Down: $dropdown
Drop-Down2: $dropdown2
Message:
$message
";
echo “Data has been submitted to $to!”;
mail($to, $subject, $body);
} else {
echo “blarg!”;
}
?>

When i click submit, i get an error. Please help me!

p.s.
I tried the form on my server and it works fine when i copy paste everything, i just cant get it to suit my needs (throw out the check boxes and radio buttons and add one more drop down list).