Cookie and Header help

[HalfLife]

I have this page:

<?php
if ($_POST['nick'] == "elil" && $_POST['pass'] == "******"){
	setcookie("user","admin", time()+1314000);
	header("Location: index.php");
} else {
	header("Location: index.php?error=9");
}
?>

Nothing else is written in it, however when I login I get this error:

Warning: Cannot modify header information - headers already sent by (output started at /home/content/c/r/e/createstar/html/eli/log_jump.php:1) in /home/content/c/r/e/createstar/html/eli/log_jump.php on line 3

Warning: Cannot modify header information - headers already sent by (output started at /home/content/c/r/e/createstar/html/eli/log_jump.php:1) in /home/content/c/r/e/createstar/html/eli/log_jump.php on line 4

Which is weird, because I send no header information...
Any guesses?

[laserlight]

Remove any blank lines at the top of your script. These will be sent as output before your setcookie() and header() calls, and thus you get a "headers already sent" warning.

[HalfLife]

There aren't any, I copied the exact file (ctrl+a)...

[HalfLife]

Oh, resolved.
It wasn't blank spaces, it was that the file itslef was written in UTF-8.

[bradgrafelman]

Don't forget to mark this thread resolved.