cannot enable groupware when Calendar and other folder are on the root of the IMAP account

Hi,

I am using kde 4.4.2 (kubuntu 10.04 LTS) at work and wanted to use kontact as 
my main calendar and mail application. My company uses Exchange as the mail 
server and i can get my mail using the disconnected imap configuration.

What i see is that my imap server has all folders in the root, so i have:

Disconnected IMAP
 - inbox
 - Calendar
 - Contacts
 - Sent Items
 ...

So i tried to enable the groupware option using kolab v1 but kontact does not 
allow me to select the account but forces me to select a folder. If i select a 
folder of course i cannot get my exchange stores appointments since they are 
on the root of the account.

To make things worse, if i open the Calendar directory i see all my 
appointments but i cannot import them into Kalendar...

I've tried to google for help and look into the userbase but i cannot find any 
help.