If you want to add any extra modules to apache, they'll need to be compiled in. Any module that needs to be compiled in will have a --with-module type flag which will need to be used. To add this flag, run the following:
cd /usr/local/directadmin/customapacheÂ
vi configure.apache_ssl
# and make sure the  character exists at the end of all lines except the last one.
./build cleanÂ
./build apache_mod_ssl
Then restart apache:
RedHat:
/sbin/service httpd restart
FreeBSD:
/usr/local/etc/rc.d/httpd restart
If you run into problems, you may also need to recompile php as well:
./build php
Then restart apache again.