Why does Spotfire only load part of my PostgreSQL database?

I am using a trial of Spotfire for Windows (Desktop)

I'm trying to connect to a PostgreSQL server on my local machine. I am able to connect and authenticate, but the "Available Tables In Database" is empty. If I start typing and then hit backspace, I am then able to see some of the tables.... but only about 40 of the 60 tables in my DB. 

When I connect to the test version of the database (much smaller in size), all the tables immediately show up under "Available Tables In Database." 

Is there a limit to the amount of data that can be loaded from an external source?

Thanks for any help!