Syncing koganizer with Google Calendar

FIrst of all, I found it very useful to have all my data in KDE Kontact. Kmail integration with Google Mail works perfectly, but there are some problems with calendar.

I’ve installed akonadi-googledata package and now is able to use Google Calendar as source in Korganizer. The problem is when I add an event in Korganizer, it doesn’t appears on web-calendar. I’ve tryied to set different syncing periods and now have no idea how to make it works.

May be someone have an idea?