Accessing non-default Calendar

Hi,

I am having a problem others seem to have had earlier this year, in
that all of my Calendar operations only access the default Calendar,
and not any of the custom Calendars.

I am using the Java Client Library, and have been able to list the
selfLink and "alternate" Link Url's for all of the Calendars (editLink
always seems to give me NPE's), but have not been able to figure out
how to edit the non-default Calendar. :(

Is there some simple step-by-step workaround that someone could explain
to me? Any help would be greatly appreciated.

-Taivo