Error

Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type LacViet.Portal.Core.SlideShowPictureWebPart, LacViet.Portal.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=7b78790143fb2798 could not be found or it is not registered as safe. Correlation ID: a72334a1-9a74-b054-ed10-16c9d98640b4.