can't open garmin map which I downloaded on dev.openstreetmap

Hello,

I have downloaded the img-file of Germany on the website

http://dev.openstreetmap.de/aio/

I have imported it with TTQV (TouraTechQuoVadis) version 4.0.127 Standard
but when I dobbleclick on it it does not open.

What can I do?

Thanks beforehands.

Björn