[kronolith] Cancelling an occurrence

[grooveman@comcast.net]

I am running kronolith 2.0.6 on horde 3.0.9 with php 4.4.

I am trying to get it to cancel a single occurrence of a recurring event.  Every Wednesday this event happens, but I want to cancel this wednesday only, without disturbing the rest of the year.

Is this possible?  Every time I try, I click "cancel" and it takes me back to my previous screen, with no changes to the event.

Thank you in advance for your help.

Chris