Since December, some Bookviser users experience problems connecting to their Skydrive account. As the problem is not universal and only happens to some users, it took us time to reproduce it. Finally the problem manifested on one of our devices and we found how to fix it. The solution is simple:
1. First of all, delete Bookviser from the list of programs in your Skydrive account. You can use this link: https://account.live.com/consent/Manage.
2. Then reinstall Bookviser on your phone. Unfortunately, all books previously uploaded on your phone will be deleted together with Bookviser.