Header may not contain more than a single header

hello,
i got this error but not beeing able to fix it; anyone could help me please?

Warning: Header may not contain more than a single header, new line detected. in /mnt/142/sdb/d/f/xxx/wp-content/plugins/cforms/lib_WPcomment.php on line 271

line 270 & 271:

header("HTTP/1.0 301 Temporary redirect");
header("Location: ".get_permalink($comment_post_ID).$cfpre.'cfemail=err'.$err. '#cforms'.$no.'form' );