guestbook question

ok this is the error i am getting now...i finally figured out how to chmod and i set the permissions to 777 ...i dont know whats wrong here but i dont want to just start deleting stuff i may need

Warning: Cannot add header information - headers already sent by (output started at /home/*****/public_html/guestbook/admin/config.inc.php:57) in /home/*****/public_html/guestbook/lib/admin.class.php on line 33

thanks

well i figured that out now but thanks for reading this even though you had no intention of helping me because im not asking about polls

but im still recieving this error when i try to post in my guestbook

Guestbook - Error
One of the input fields does not seem to be valid.

the required fields should be valid so i dont know why im getting this message...any suggestions???

once again nevermind i have found the problem and fixed it all by myself
you guys are a lot of help though

i would tell you where to shove your little poll question helpers but then again you probably have already done that