I don’t have information what kind of pages you want to display what kind of related items, what are your goals, what did you set up, what data would you like to use to create relationship (by common content, by common category, by manual binding, …). Are you using the lite or pro version?
First, please make the settings according to the documentation:
If the settings are done according to the documentation and there are no results, you may set lower the threshold.
If it doesn’t work, please provide more information on the above questions and a send screenshots of the settings.