C#连接Access数据库问题 - .NET技术 / C#

我写了一段很简单的用ado.net连接数据库的代码，可是运行后提示没事可安装的ISAM！
这是什么意思？我该怎么做才能正常连接。
代码如下：
C# code:

static void Main(string[] args)
{
OleDbConnection thisConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;DataSource=Human.mdb");

thisConnection.Open();

OleDbCommand thisCommand = thisConnection.CreateCommand();

thisCommand.CommandText = "SELECT xm,xb from human";

OleDbDataReader thisReader = thisCommand.ExecuteReader();

while(thisReader .Read())
{
Console.WriteLine("\t{0}\t{1}",thisReader["xm"],thisReader ["xb"]);
}
thisReader.Close ();
thisConnection.Close();

Console .Write ("Program finished,press Enter/Return to continue:");
Console.ReadLine();

}

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连接字符串不正确。

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谢谢啊 原来是这样啊