Hello,
If you want to display child document please make sure you have set the
Path property to the following vaue ./% and the
Document types property contains a list of all document types you want to display.
Anyway, what version of Kentico
CMS are you using?
Moreover, have you applied the latest hotfix for your current version?
Could you please post here the export of the web part properties (click the link
Export webpart properties at the bottom of the web part properties)
Best regards,
Michal Legen