[CoreTheMan]

I have a Verse Pro Color, and the "Read" Column update doesn't work.
To get an idea what might go wrong I started calibre from the console with calibre_debug -g, and the output shows that the open() method is called -> plugin is used (as I can also see from the left lower corner display).
However, if I mark a book or two and send them to my device, there is no debug info from the plugin in the console...it says
Device using plugboard epub POCKETBOOK_IMPROVED None (sounds good)
but then no other message. I think this means that the synchronize_with_db() method doesn't seem to be called. There is a line "debug_print('PB_IMPROVED: start sychronize_with_db')" in device.py, which should lead to some output, right?
So can you guide me to what I might be missing?