USB Mass storage project not getting device insert/remove callback

I have a project that uses fileX on MMC as well as FileX on an removable USB mass storage flash stick.  The USB portion is built around the thread Renesas Module Guide of Nov 27, 2017 and the demo IAR project.  The code never gets the callback function when a USB stick is inserted.

I've compared common_data.c between my project and the demo project and there is nothing that seems missing.

I'm not sure how to debug. Am I missing an interrupt?  I've added mem to the usb pool (65K) and the int and thread priority match the demo.

Thanks

Larry