addon for h2 driver fails, hence cannot reverse engineer

I'm following the instructions in the 'getting started with roo' book. Arriving at the reverse engineering step (page 15) I'm stuck in an eternal loop: when i execute the advertised 'database reverse engineer' command the shell responds that I don't have a h2 driver, and suggests to add a driver he found himself. OK, so i added that driver. Upon the next attempt to reverse engineer the shell claims that the driver isn't found !? The roo shell log is attached to this message. Roo version is 1.2.2.RELEASE.