I'm trying to install mod_auth_mysql 2.20. But when I start apache (httpd) i get the error: Cannot load /etc/httpd/modules/mod_auth_mysql.so into server: /etc/httpd/modules/mod_auth_mysql.so: undefined symbol: register_cleanup Setup is: mod_perl 1.24. Built with EVERYTHING=1, apxs method for loading Apache is 1.3.12 from RedHat RPM with CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" added O/S Redhat 6.2, Perl 5.6.0 I installed auth_mysql using the method from the mini HOWTO Apache-mods-3 cd to the source directory cp config.h auth_mysql_config.h /usr/sbin/apxs -i -a -I/usr/include/mysql -L/usr/lib/mysql -lmysqlclient -c mod_auth_mysql.c Hope someone can help .. -pete