header

In my index.php file of my system i have got just one php tag in which it starts a smarty object, make a lot of includes of templates and use $smarty->display("index.tpl") to show the result. Until i know, smarty do not send any data to browser before display method, but, in some cases i must do header(location: sompage.php") and it gives the follow error: Warning: Cannot modify header information - headers already sent by (output started at /usr/local/apache2/htdocs/www2.superbanco.com.br/html/index.php:1) in /usr/local/apache2/htdocs/www2.superbanco.com.br/html/modules/loja/identificacao.php on line 15 Anyone know why is it happen? If so, how can i avoid it? -- João Cândido de Souza Neto Curitiba Online joao@curitibaonline.com.br (41) 3324-2294 (41) 9985-6894 http://www.curitibaonline.com.br