SQLite works well with Androïd, with iOs but not with Windows Phone 8 in Isolated Storage

I give a link (below) with a small project "Xamarin Forms". It's a simple access to a Table in a SQLite database.

=> https://github.com/smouligneauxmw/POCSqliteCrossPlatformXamarin

This project works on Android and iOS but not with Windows Phone 8.

I try since a long time to find the problem but impossible to connect to my SQLite table..

Any idea ?