关于MapXtreme连接Oracle的问题！

<P>在MapXtreme中读取Oracle中的空间表，总是提示“ Oracle Error: OCI RC=-1, DBMS RC=12560, DBMS Msg=ORA-12560: TNS: 协议适配器错误”，不知道是什么原因，那位高人指点一下?</P>
<P>代码如下：</P>
<P>string conInfo = "svr=168.100.1.100;uid=DGFMAP;pwd=DGFMAP";</P>
<P>MIConnection Connection = new MIConnection();<BR>    Connection.Open();<BR>    MapInfo.Data.Table[] tables = new MapInfo.Data.Table[1];<BR>    TableInfoServer tis1 = new TableInfoServer("USA", conInfo, "select * from USA", MapInfo.Data.ServerToolkit.Oci);<BR>    tis1.CacheSettings.CacheType = CacheOption.Off; // On is the default<BR>    tables[0] = Connection.Catalog.OpenTable(tis1);<BR>    mapControl1.Map.Load(new MapInfo.Mapping.MapTableLoader(tables));<BR>    Connection.Close();</P>

<img src="images/post/smile/dvbbs/em01.gif" />