I already install irstats2 from eprints bazaar. the process is success. the next process is it I must run this command : /archives/REPO_ID/bin/stats/process_stats REPO_ID --setup --verbose OR maybe other command

When I run http://sir.stikom.edu/cgi/stats/report, the display is empty. I already attach the screenshoot.

Is there any process that I must running???

Notes : 
when I run this command : 
/archives/REPO_ID/bin/stats/process_stats REPO_ID --setup --verbose

it shows error :
Use of uninitialized value in concatenation (.) or string at (eval 67) line 11.
Use of uninitialized value in concatenation (.) or string at (eval 67) line 16.
Use of uninitialized value in concatenation (.) or string at (eval 67) line 19.

------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in configuration:
Can't call method "add_trigger" on unblessed reference at /usr/share/eprints3/archives/sir2014/bin/../cfg/cfg.d/z_irstats2.pl line 162.


------------------------------------------------------------------
EPrints System Error inducing stack dump
 at /usr/share/eprints3/archives/sir2014/bin/stats/../../../../perl_lib/EPrints.pm line 146
        EPrints::abort('EPrints') called at /usr/share/eprints3/archives/sir2014/bin/stats/../../../../perl_lib/EPrints/Config.pm line 151
        EPrints::Config::load_system_config() called at /usr/share/eprints3/archives/sir2014/bin/stats/../../../../perl_lib/EPrints/Config.pm line 96
        EPrints::Config::init() called at /usr/share/eprints3/archives/sir2014/bin/stats/../../../../perl_lib/EPrints.pm line 706
        require EPrints.pm called at /usr/share/eprints3/archives/sir2014/bin/stats/process_stats line 12
        main::BEGIN() called at /usr/share/eprints3/archives/sir2014/bin/stats/../../../../perl_lib/EPrints.pm line 0
        eval {...} called at /usr/share/eprints3/archives/sir2014/bin/stats/../../../../perl_lib/EPrints.pm line 0