Google Calendar - No Calendar?

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Greetings!

Today I've synced my Pola100 with my Google-Account. I got all my contacts, but the Calendar-App doesn't load the calendar from my Google-Account.

When I'd like to make an entry, my Pola just tells me, that I've got no calendar. When I want to choose a calendar (Menu -> More -> Calendar), there's is no calendar listed to choose.

I'm using:

-Incubus26Jc's Super FroYo 2.2 RLS12
-Standard Calendar App

Does anybody have a solution?

EDIT: Well. The problem solved itself after I had to reinstall my system, because it crashed somehow, after my battery got empty.

P.S.: Where can I set up my signature?