Join Relationship window does not display in RS Join

Windows 7 64-bit
Cognos BI 10.2.0 FP1
Report Studio
Query Explorer
Data Source: Oracle 11g
Query Mode: Compatible\DQM (occurs in both)

I am attempting to join two queries. When the Join is dbl-clicked from the work area or in the Properties window, the Join Expression window is displayed instead of the Join Relationships window.
I need to set the cardinality as a Left Outer Join.
This is for a new Join in a new report.

What causes the Join Relationship window to not display?