最近在学习asp做留言板，出现问题：Microsoft OLE DB Provider for ODBC Drivers 错误 '80004005'

[Microsoft][ODBC 驱动程序管理器] 未发现数据源名称并且未指定默认驱动程序

/liuyan.asp，行 8
代码：Dim Recordset1
Dim Recordset1_numRows

Set Recordset1 = Server.CreateObject("ADODB.Recordset")
Recordset1.ActiveConnection = MM_liuyan123_STRING
Recordset1.Source = "SELECT * FROM 123a"
Recordset1.CursorType = 0
Recordset1.CursorLocation = 2
Recordset1.LockType = 1
Recordset1.Open()
望高手能帮助下，小弟在此谢了！http://26535.