HTTP headers - what is wrong

[Chris Faust]

Folks,   I need to expire a page so if a user uses his back button, he will not be able to the previous page (which as a form etc.)..   On perl.apache.org I found $r->no_cache(1);   Which works great, the problem is right before I print out any HTML, I changed   $CGI->header to $r->send_http_header;   Which only seems to work in IE - if I use anything else like Netscape or Modzilla, it prints the HTML out to the screen - just like the HTML was a text document and the brower opened the text file (if that makes sense).   Any idea?   RH Linux 8 Apache/2.0.44 (Unix) mod_perl/1.99_08 Perl/v5.8.0   Thanks -Chris