I have CentOS server ( Server version: Apache/2.2.15 (Unix) Server built: Feb 13 2012 22:31:42 ) with mod_fastcgi.x86_64(2.4.6-2.el6.rf) and php 5.3.3. some sites not work on fastcgi mode. In apache error.log: [Mon Sep 03 19:20:37 2012] [warn] [client 80.*.*.*] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Mon Sep 03 19:20:37 2012] [error] [client 80.*.*.*] Premature end of script headers: index.php Can anybody tell me how solve this?