How long to rebuild library on Innous Zen Mini Mk II?

I just received a used Innous Zen Mini Mk II. I started it through the my.innous.com site. It appeared on the system and I was able to start ripping (very fast). I burned about 10 discs and want to try the playback, but when I go to library, it continues to search. I went to the system settings to clear and rebuild the library, but after an hour it is still going. How long should I expect it to take for so few discs?