Setting HIIT workout alarms

[Thirio2]

I followed instructions for setting up intervals for a high intensity interval run and it seemed to work, except that it did not tell me when to start each interval, which is what I wanted. It told me when I was halfway through and when my goal was achieved, but I never actually did the workout because it never told me to start. How do I get it to announce the start of each interval (work, rest, work, rest, etc)? When I start running it is hard for me to see the time on my watch to know when to walk.