SSRS Report Parameter from external DataSet not showing up - AX 2012 R2

I'm creating a report that is run from an external data source (stored procedure) to run in AX.  In this report, I defined a second Data Set (also external stored proc) that is just a list of values (ID, Value).  I am using it as the list to pick from for a parameter for the main dataset.  I have another parameter that is No/Yes (0/1), which I entered as a non-queried selection of values for the parameter.  When running the report in the VS2010 report designer, everything works fine.

However, when running from a menu item in AX, I get a very non-helpful text field instead of a picker.


Why isn't AX respecting my parameter value lists?  What am I doing wrong here?