Problem with new line in loading data to textfile

Hi I´m using a guestbook from flash-db and my problem is that it doesn´t suport linechanges when typing a message.

The original code was

$Submit 	= $_POST["Submit"];
$Rubrik		= $_POST["Rubrik"];
$Name 		= $_POST["Name"];
$Comments 	= $_POST["Comments"];

And I replaced it with this after consulting some foruma etc…

$Submit 	= $_POST["Submit"];
$Rubrik		= $_POST["Rubrik"];
$Name 		= $_POST["Name"];
$Comments     = nl2br($_POST["Comments"]);

This changes the use of the “enter key” to “br /” now what I wanted was it to change it into <br> so when I load it into my flash textfield it changes lines everytime enter is used.

Any ideas?

Attaching phpfile