I'm upgrading from 1.2 to 1.3 but I got some problem with the new stats

the system is new is

Gentoo

Apache 2

mod_perl

mod_php

fastcgi

GD 2.16

GD::Graph 1.43

When I try to make a statistic in format graph (but also bargraph etc.)

I get

Can't call method "png" on an undefined value at /opt/otrs//Kernel/Modules/SystemStats.pm line 333.\n

gentoo is compild with USE=png.....

Ciao

AleX