My reminders stopped showing on my calendar, how do I fix that?

[RocKDF]

While online, my reminders have stopped "popping up" to remind me...but when
I worked offline yesterday, all of a sudden about 20 old reminders surfaced.
How do I fix it so they work like they should?

 

[Oliver Vukovics]

Hi RocKDF,

I prefer to start Outlook with the command line "/Cleanreminders"

have a look on this site for further information:
http://office.microsoft.com/en-us/outlook/HP010031101033.aspx

Maybe it helps.