请教，数据库格式问题

<P>诸位达人，我在VB＋MAPX开始进行DAO绑定的时候，做出如下代码，运行时，红色代码处发生问题，说错误代码3343“不可识别数据库格式”。我想请教一下，是否数据库有什么要求？谢谢</P>
<P>代码如下：</P>
<P>Dim ds As MapXLib.Dataset</P>
<P>  Dim flds As New MapXLib.Fields<BR>   Dim db As DAO.Database<BR>   Dim rs As DAO.Recordset</P>
<P>   <FONT color=#f70909>Set db = DBEngine.Workspaces(0).OpenDatabase("E:\My Documents\My Pictures\jscity.mdb")</FONT><BR>   Set rs = db.OpenRecordset("table1")</P>
<P>  <BR>   flds.Add "名称", "名称", miAggregationIndividual, miTypeString<BR>   'flds.Add "DB2", "DB2byDAO", miAggregationIndividual, miTypeString<BR>   <BR>    Set ds = MainForm1.Map1.Datasets.Add(miDataSetDAO, rs, "city_1", "名称", , "cities", flds)</P>