WordPress MU

when I try to login to my MU backend i get the error

Warning: Cannot modify header information - headers already sent by (output started at /home/andy/public_html/blogmethat/wp-config.php:67) in /home/andy/public_html/blogmethat/wp-includes/pluggable.php on line 776

now I have deleted all the files except wp_content and re-uploaded fresh and this did not fix this problem

This started after trying to integrate BBPress into MU which did not work right

What do you have in wp-config.php somewhere at the end? Extra returns?

Also, have you enabled FastCGI on your server? If yes - try disabling it and see if this helps.

That usually means there's whitespace at the bottom of a file. usually the last file you edited / uploaded.

Great thanks guys I will check that out and see and what happens

Update:
I feel so much like a Noob now. Thanks so much that fixed the issue i had an extra carriage return