[O] Weekly date in grid view

[Jürgen Fenn]

Hello,

I've recently begun using org-mode and I love it. :)

However, I fail to define a weekly date to be displayed in grid view
that runs from 2012-02-01 through 2012-05-23, i.e. every Wednesday
evening from 19.00 to 20.00. When I use this

** TODO 34/2012: Qi Gong, 19-20 Uhr (bis 23.5.)
   SCHEDULED: <2012-02-01 Wed 19.00-20.00 +1w> DEADLINE: <2012-05-23 Wed>

the date is included in agenda, both weekly and daily, but it is not
displayed in grid view in neither as other dates are.

What's wrong with this notation, please?

Thanks in advance!

Regards,
Jürgen.