Wrong event status shown in emclient calendar (with zarafa-ical)

i have a problem with the caldav calendar with zarafa ical gateway.
i created an event in the webclient of zarafa:
BEGIN:VEVENT
TRANSP:OPAQUE
X-MICROSOFT-CDO-INTENDEDSTATUS:TENTATIVE
CREATED:20131027T094436Z
LAST-MODIFIED:20131027T094637Z
DTSTAMP:20131027T094637Z
DTSTART;VALUE=DATE:20131029
DTEND;VALUE=DATE:20131101
SUMMARY:Urlaub tbd
PRIORITY:5
CLASS:PUBLIC
UID:
040000008200E00074C5B7101A82E008000000000055F42DF9D2CE01000000000000000001
000000226DE1E949284D8E948CEF4FF50CD24F
X-MICROSOFT-CDO-OWNER-CRITICAL-CHANGE:20131027T094937Z
X-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE:20131027T094937Z
X-MICROSOFT-CDO-APPT-SEQUENCE:0
X-MICROSOFT-CDO-OWNERAPPTID:-1
X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
END:VEVENT

But in emclient the status of the event is shown as busy and not tentative as it should be:
BEGIN:VEVENT
TRANSP:OPAQUE
X-MICROSOFT-CDO-INTENDEDSTATUS:TENTATIVE
CREATED:20131027T094436Z
LAST-MODIFIED:20131027T100146Z
DTSTAMP:20131027T094637Z
DTSTART;VALUE=DATE:20131029
DTEND;VALUE=DATE:20131101
SUMMARY:Urlaub tbd
PRIORITY:5
CLASS:PUBLIC
UID:040000008200E00074C5B7101A82E008000000000055F42DF9D2CE010000000000000000
01000000226DE1E949284D8E948CEF4FF50CD24F
X-MICROSOFT-CDO-OWNER-CRITICAL-CHANGE:20131027T094721Z
X-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE:20131027T094721Z
X-MICROSOFT-CDO-APPT-SEQUENCE:0
X-MICROSOFT-CDO-OWNERAPPTID:-1
X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
X-MICROSOFT-CDO-BUSYSTATUS:BUSY
END:VEVENT
END:VCALENDAR

Hello,

can you please send me that .ics directly to galis@emclient.com with url to this topic in subject?

with regards
Jan