Don't use the return key. If you get an error message, make sure you spelled your unique name and user number correctly. If you hit return after either entry, you should delete the return character or you can re-enter the data. In the calendar you should see dates for this week. These are charged at the day rate.
Blue times are off peak and are charged at the night rate.
There is no restriction on prime-time bookings for the current week. Click on a timeslot to book it. Another window will appear with the start and end time limits for this slot entered automatically. You cannot cancel on the day of your booking. This will close the files and quit FileMaker.