C#读取access2007数据库表中记录

第一次用Access数据库，大家帮忙。
我的链接字符串是： 
        <add key="DbProviderName" value="System.Data.OleDb"/>
        <add key="TaxInvoiceConn" value="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\Tax.accdb;Persist Security Info=True"/>
        public static DataSet GetAllTaxPlayer()
        {
            DbHelper helper=new DbHelper();
            DataSet ds=new DataSet();
            string sqlStr = "Select TaxID,TaxName,Name,IsImpose,Tax,TradeID,Scope,DistrictID,ManagerID,Phone,Mobile From TaxPlayer";            DbCommand dbCom = helper.GetSqlStringCommond(sqlStr);
            try
            {
                ds = helper.ExecuteDataSet(dbCom);
            }
            catch (ApplicationException ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                
            }
            return ds;
           
        }
       private static string dbProviderName = ConfigurationSettings.AppSettings["DbProviderName"];
        //private static string dbp = "Provider=System.Data.OleDb";
        private static string dbConnectionString = ConfigurationManager.AppSettings["TaxInvoiceConn"];        private DbConnection connection;
        public DbHelper()
        {
            this.connection = CreateConnection(DbHelper.dbConnectionString);
        }
       public static DbConnection CreateConnection(string connectionString)
        {
            DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
            DbConnection dbconn = dbfactory.CreateConnection();
            dbconn.ConnectionString = connectionString;
            return dbconn;
        }       public DbCommand GetSqlStringCommond(string sqlQuery)
        {
            DbCommand dbCommand = connection.CreateCommand();
            dbCommand.CommandText = sqlQuery;
            dbCommand.CommandType = CommandType.Text;
            return dbCommand;
        }       public DataSet ExecuteDataSet(DbCommand cmd)
        {
            DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
            DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
            dbDataAdapter.SelectCommand = cmd;
            DataSet ds = new DataSet();
            dbDataAdapter.Fill(ds);
            return ds;
        }错误：Microsoft Office Access 数据库引擎找不到输入表或查询“TaxPlayer”。请确定它存在且其名称拼写正确。
我的表名是正确的。