Caldavio and gmail problem

Add-ons Bindings
1

Hi !
I want to achieve simple thing just import date and name of coming event. All events are registered in Google calendar / gmail.
Based on wiki and examples I have add config:

 #calendar
caldavPersonal:usedCalendars=Openhab
caldavio:usedCalendars=Openhab
caldavio:Openhab:url=https://www.google.com/calendar/dav/email/events
caldavio:Openhab:username=my gmail's email
caldavio:Openhab:password=pass
caldavio:Openhab:reloadInterval=100
caldavio:Openhab:preloadTime=20000
caldavio:timeZone=Europe/warsaw

Items:

String Event   "Wydarzenie [%s]"     <calendar>  { caldavPersonal="calendar:Openhab type:ACTIVE eventNr:1 value:NAME" }
DateTime Event_Date "Wydarzenie o [%1$tT, %1$td.%1$tm.%1$tY]"         <calendar>  { caldavPersonal="calendar:Openhab type:ACTIVE eventNr:1 value:START" }

In the log there is no info (and no error) about Caldavio module, in event log I got:

2016-11-23 22:42:20 - Event state updated to Undefined
2016-11-23 22:42:20 - Event_Date state updated to Undefined

I have caldav-command, caldav-personal and io.caldav in addons folder.

On my gmail account this calendar is public.
What is wrong in config ? Should log consist info about logging to my calendar ?
Do you have maybe your examples with gmail ?

2

I build trace logs and it looks that events are imported, but not from proper calendar.
Under my gmail account I have few calendars, so how to force OH to load proper one ?
I use same calendar-id in cfg like this one from gmail account, but it looks that it doesn’t work.

Any ideas ?