Roundcube + pigeonhole ERROR

I use custombuild2 to install pigeonhole:

cd /usr/local/directadmin/custombuild
./build set pigeonhole yes
./build dovecot
./build roundcube

it's install without error but when i go to roundcube and click on Filters i get error: Cannot connect to server!

I solve this error:

File to Edit: /var/www/html/roundcube/plugins/managesieve/config.inc.php
Find: $rcmail_config['managesieve_port'] = null;
Change: $rcmail_config['managesieve_port'] = 4190;

Thank you for the report. It will be fixed into the next public release of CustomBuild 2.0.