[horde] Assigning calendar editing permissions to child group

[Abu Hurayrah]

Greetings all,

I've just successfully installed Horde Groupware Webmail edition 1.0 on 
my aging RHEL3 server, and I couldn't be more pleased.  Horde really 
demonstrates a level of refinement that is exceptional, even in the 
world of free-and-open-source software.  I am still learning how to use 
it, though, and I had a question that I couldn't find an answer to.

I have created groups and child groups under these groups, to a depth of 
three levels, so far.  I want to be able to assign permissions to groups 
to, for example, be able to edit a calendar I've created.  However, the 
only group available under the permissions menu for my calendar is the 
root group I created, and none of the children groups.  I guess I 
thought that any group would be able to have permissions assigned to 
it.  Am I wrong, and if so, can someone explain to me where child groups 
would be utilized?  I would sincerely appreciate it.

Thanks in advance!