[itsm] ITSM-Location Problem

Hi, I have a problem with adding new locations in the admin interface. I can't choice the type here, i have no possibility to choice any entry from the general-catalog-class ITSM::ConfigItem::Location::Type https://kh-web-srv03.bbw-akademie.de/otrs/index.pl?Action=AdminGeneralCatalo... , becauset here is no text field for type. I hope anybody can help me. Thanks in advance M.Wehr