Query with three tables

Hi,

I am trying to create a query with SOD using three tables. The main table is the Value Entries table and then I want to joint to the customer table to obtain the customer name and also the item table to obtain the item description, but when I try and add the item table I get the message “New elements must be inserted at the end of the query.” and I cannot work out how to add it.

See attached screenshot.

Thanks

Jonathan