PRS-T2 Sync Error: Log in to Reader Store

Hi all,

after buying the T2 it was a nice surprise that the integrated reader app seems to offer a possibility to sync reading progress between multiple devices.

Unfortunately when I try to use it it keeps telling me that I have to log in to Reader Store (don't know the exact message, since me T2 is German). But I _am_ logged in. I already tried to log out and log in again but the result is the same.

Ideas anybody?

Thanks

Silas