Cannot modify header information

[hawt]

Every time I try to run this code

			$do = 1;
			$cookie_life = time() + 31536000;	
		setcookie('clogin', $clogin, $cookie_life);
		setcookie('clevel', $clevel, $cookie_life);
		setcookie('crank', $crank, $cookie_life);
		setcookie('cid', $cid, $cookie_life);
		setcookie('ccheckin', $do, $cookie_life);

I get these errors.

Warning: Cannot modify header information - headers already sent by (output started at /home/hawthorn/public_html/sitefunctions.php:123) in /home/hawthorn/public_html/loginact.php on line 29

Warning: Cannot modify header information - headers already sent by (output started at /home/hawthorn/public_html/sitefunctions.php:123) in /home/hawthorn/public_html/loginact.php on line 30

Warning: Cannot modify header information - headers already sent by (output started at /home/hawthorn/public_html/sitefunctions.php:123) in /home/hawthorn/public_html/loginact.php on line 31

Warning: Cannot modify header information - headers already sent by (output started at /home/hawthorn/public_html/sitefunctions.php:123) in /home/hawthorn/public_html/loginact.php on line 32

Warning: Cannot modify header information - headers already sent by (output started at /home/hawthorn/public_html/sitefunctions.php:123) in /home/hawthorn/public_html/loginact.php on line 33

I looked in the sitefunctions.php file on line 123 and thats the end of the file. I'm not seeing what is going on here.

[Buddha443556]

If you don't have any echo's or print's before the setcookie's then check for stray whitespace outside of these <?php ?>.