arrow buttons don't work

here what appear when i run it from terminal:

[_LOG_LEVEL_INFO 15:12:38.019040] Application.vala:75: Foto version: 0.1
[_LOG_LEVEL_INFO 15:12:38.019220] Application.vala:77: Kernel version: 3.2.0-38-generic
[_LOG_LEVEL_FATAL 15:12:38.019281] [GLib-GIO] g_application_activate: assertion `application->priv->is_registered' failed
[_LOG_LEVEL_FATAL 15:12:38.019343] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:38.038665] foto_album_manager_picture_get_picture_path: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:38.038745] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:38.039590] foto_album_manager_picture_get_picture_path: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:38.039652] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:38.047561] [Gtk] gtk_check_menu_item_set_active: assertion `GTK_IS_CHECK_MENU_ITEM (check_menu_item)' failed
[_LOG_LEVEL_FATAL 15:12:38.047616] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:39.260025] foto_album_manager_album_get_album_name: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:39.260144] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:39.260512] [Gtk] gtk_box_pack: assertion `gtk_widget_get_parent (child) == NULL' failed
[_LOG_LEVEL_FATAL 15:12:39.260583] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:54.679192] utils_image_list_get_position: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:54.679335] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:54.679427] utils_image_list_get_filename: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:54.679507] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:54.679595] utils_image_list_get_filename: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:54.679674] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:54.679762] utils_image_list_get_full_filename: assertion `self != NULL' failed
[_LOG_LEVEL_FATAL 15:12:54.679841] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:54.679929] foto_widgets_picture_widget_set_image: assertion `filepath != NULL' failed
[_LOG_LEVEL_FATAL 15:12:54.680009] Foto will not function properly.
[_LOG_LEVEL_FATAL 15:12:54.680110] __lambda21_: assertion `image_basename != NULL' failed
[_LOG_LEVEL_FATAL 15:12:54.680166] Foto will not function properly.