Warning when calling session_start()

Hi, folks, good morning ! Since I'm a newbie with respect of sessions & cookies I'm quite lost here getting always a warning when calling session_start(); I developed and tested some php code using a session to pass some values betwen different scripts on my local machine. All went O.K. But when I transferred the code to my provider's server where my website is hosted, I constantly get this warning when calling session_start(): Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /...../sess.php:3) in /...../sess.php on line 5 In line 5 is session_start(); I dotted-out the path prefices in this warning. Lines 1-5 of my script "sess.php" are as follows: 1 <!-- ---- PHP CODE ------------------------- -> 2 3 <?php 4 5 session_start (); In my browser (firefox) I've enabled cookies. There were some differences between my local machine and my provider's server in respect to session related PHP flags/variables. I adapted those by adding following lines in .htaccess on the webserver: php_flag session.bug_compat_42 off # Was On php_value session.bug_compat_42 off # Was On php_flag session.cookie_httponly on # Was off php_value session.cookie_httponly on # Was off php_flag session.use_only_cookies On # Was off php_value session.use_only_cookies On # Was off Can anybody give me some hints for resolving this issue and/or pointers where to dig further ?!? Thanks in advance ! Rolf -- Dipl.phys. Rudolf Otto Blättner, D 91074 Herzogenaurach, Germany.