ListPicker not showing correct elements in FullScreenMode

I have an array of album and their infos retrieved from a query in a SQLLite Database. Like this

idalbum  album_name   album_label album_year
1        Nevermind    Sony        1996
2        Dark Horse   WarnerBros  2008

and I want to visualize just the name in a List Picker. So I binded its ItemsSource to the array, like this

public List<clsAlbums> alb_array;

SQLiteCommand command=conn.CreateCommand("SELECT * FROM album");

                alb_array=command.ExecuteQuery<clsAlbums>();

                albSelect.ItemsSource = alb_array;  

                albSelect.DisplayMemberPath = "album_name";

and it correctly shows the name of the album. However, when I click on it to change the name, it goes to FULL SCREEN MODE, and I get this list of elements

newproject.Model.clsAlbums
newproject.Model.clsAlbums
newproject.Model.clsAlbums
newproject.Model.clsAlbums etc.....

and so on (I saved clsAlbums.cs in the Model folder and imported it with using). Why does it happen? Because if I click one of them, the full screen mode closes and the ListPicker box correctly shows the name of the album, just not in fullscreen.