open_basedir restriction in a2billing

HI I like to install a2billing with ehcp. Normally A2billing store one file with the configuration in
/etc/a2billing.conf
But when I try to access to my a2billing Admin GUi
I get open_basedir restriction in effect. File(/etc/a2billing.conf) is not within the allowed path(s):

How I get or change in EHCP open_basedir for allow A2billing Access
Thanks in advance

try a sym-link:

ln -s /usr/local/src/asterisk2billing/a2billing.conf /etc/a2billing.conf

Really I not see the difference
The problem is a2billing customer UI or Admin UI can't read files outside vhost because EHCP have activated
open_basedir restriction
The problem is how I switch off that in specific domain

Thanks " ehcpdeveloper " I delete temporally How you means in other post "choose domain, click on "edit apache template" in ehcp gui, then, remove line saying open_basedir "
I remove the line: "php_admin_value open_basedir {homedir}" Now I understand why in Custom httpd when I make before apache reload Say php_admin_value open_basedir is duplicated.

For new versions is great any Button in the control panel for deactivate open_basedir

Anyway is a great Control Panel and the best I see working with servers with Ejabberd Really very easy