Do you have other alarms that do display in the alarm summary.
If these are the only alarms have you gone to the Startup Folder and set them to go.
If these are new alarms have you rebooted the computer since they were created so that these new alarms are activated, also on a reboot you can look in the Activity log and see if Alarms are starting at the time of reboot.
My standard response to this question: Did you turn on alarming? Oops, I didn't read you response closely enough. Try turning off the alarms and then back on again with the AlarmOff and alarmon commands.