"every other week" doesnt work

confirmed that "every other week" doesnt work with eventrepeat-1.0 using event-1.0

my steps:
I have my own cck type, "course-meeting".

In the admin/content/types/course-meeting
I have configured
Show in event calendar: Only in views for this type

and checked "Allow repeat events"

When I add this content type, I enter the start and finish dates.
september 5 2008-8:00
september 5 2008-11:15

Repeate type: weekly
end settings: december, 5 2008
advanced:
interval: 2
days: Friday

This only produces the original node, and none later in the sequence.
When I change interval to "1" it creates one every week (as it should).

can I give you any more information?