so... have this problem

Warning: Cannot modify header information - headers already sent by (output started at /srv/www/htdocs/web156/html/sg/intern.php:4) in /srv/www/htdocs/web156/html/sg/checkchose.php on line 20

can anybody help me??

if you want more datils of the files... plaese message or reply

thanks

First thing to check,
make sure you don't have any whitespace (ie, blank lines) before and after your php tags.

you get this error if you have html tags before the php-function header is executed

I use a JavaScript redirect to avoid this problem.

Look at JavaScript location.replace. It makes life simpler.

if javascript is enabled in the user's browser

what exactly are you trying to do? Redirect a user, use start_session(), etc... This message can be caused by many things. I would suggest that you paste part of the code so we all can give more specific answers.

ah yes..... thanks a lot^^ I had a include part and in the other file was html in front of it =)