Instance Attempt Analysis data view not joining with Instances data view

Summary

Trying to join data views on Instance ID field

Content

I have created a custom BI Report using the Instance Attempt Analysis and Instances data views.  They are joined using the following condition:

Instances INNER JOIN Instance Attempt Analysis ON Instances.Instance ID = Instance Attempt Analysis.Instance Attempt Analysis Instance ID

Yet the report is coming up blank.  I only really need the data from Instance Attempt Analysis, and the report works just fine when I only include that data view.  However, for user-friendliness, I want to include some information about the Instance, like the name of the test.