[Koha] need help on MARC configuration error.

I use Debian 3.0 (bf24) and get MARC installed through Perl -MCPAN -e 'install "MARC::Record" ' The dependency seems fine since Make is good. Then I run installer.pl for install koha and it seems fine too. I launched the koha application through 8080 (intranet port) and go to parameter-->MARC check, I get everything OK but one configuration error. itemtypes table empty How can I fix this error?