Can't add a clock with SYS/BIOS on the MSP430F5310

I am using XGCONF to try to add a clock to my system so that I can use Task_sleep, and every time I save task.cfg the validating task.cfg changes my selection to "Clock_tick() is never called".  There is no explanation on the UI.  I started with the code that sets up a timer and posts a semaphore in the interrupt.  This works fine, but I need the Task_sleep() concept.  I am using 6.32.05.54. I have tried removing all timers, and creating my own so that I can call Clock_tick, but I can't add a clock.