The database is in the DB_wangmeng.cn folder (sql2005), just attach it. Administrator username wangmeng.cn Password wangmeng.cn Driver username: Wangmeng Password: wangmeng.cn Department user name: Wangmeng Section Password: wangmeng.cn Modify the App_Code/Jjchatdb.cs file public static SqlConnection createConnection() { SqlConnection con = new SqlConnection(@"server=THREEJEK-PCSQLEXPRESS;database=aaa;uid=sa;pwd=sa;"); return con;//Change server= here to your own database instance name } If you have any questions, please go to http://ask.wangmeng.cn and the administrator will reply as soon as possible.