php fatal error freepbx-2.2.0rc1

hallo
habe versucht auf suse 10.1 astersik 1.2.13 und freepbx zum laufen zu bringen.
als vorlage habe ich https://adminloesungen.ott-service.de/tikiwiki/tiki-read_article.php?articleId=7&page=1
verwendet
jetzt kommt beim installieren von freepbx folgender fehler :

dhcppc1:/usr/src/freepbx-2.2.0rc1 # ./install_amp
Checking for PEAR DB..OK
Checking for PEAR Console::Getopt..OK
Checking user..OK
Checking for /etc/amportal.conf..OK
Reading /etc/amportal.conf..OK
Checking for /etc/asterisk/asterisk.conf..OK
Reading /etc/asterisk/asterisk.conf..OK
Using asterisk as PBX Engine
Checking for Asterisk 1.2..OK
Checking for selinux..OK
Connecting to database..OK
Checking current version of AMP..2.2.0rc1
Installing new AMP files..OK
Configuring install for your environment..OK
Setting permissions on files..OK
Checking for upgrades..0 found
Generating AMP configs..
Generating Configurations.conf..

Checking for PEAR DB..OK
Checking for PEAR Console::Getopt..OK
Running module install.php and install.sql scripts
Checking for /etc/amportal.conf..OK
Reading /etc/amportal.conf..OK
Reading /etc/asterisk/asterisk.conf..OK
Connecting to database..OK
Connecting to Asterisk manager interface..OK
PHP Fatal error: Call to undefined function _() in /srv/www/htdocs/admin/functions.inc.php on line 1642
Generating AMP configs..OK
Restarting Flash Operator Panel..OK
Please update your modules and reload Asterisk by visiting http://localhost/admin

hat jemand eine idee ....