连接access数据库coldlead.mdb，里面有一个表orderlist，运行程序后，创建一个其他的表，表orderlist就没有了。不知道为什么？
代码：
private void enterButton_Click(object sender, EventArgs e)
        {           
            //instance a connect
            ADOX.CatalogClass cat = new ADOX.CatalogClass();
            ADODB.Connection cn = new ADODB.Connection();
            //open the databank that has foundation
            cn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + Application.StartupPath + @"\ColdLead.mdb'", null, null, -1);
            cat.ActiveConnection = cn;
     
            //creat a table
            string name = productionOrderTextBox.Text;
            ADOX.Table table = new ADOX.Table();
            table.Name = name;
            ADOX.Column column1 = new ADOX.Column();
            column1.ParentCatalog = cat;
            column1.Name = "RecordId";
            column1.Type = DataTypeEnum.adInteger;
            column1.DefinedSize = 9;
            column1.Properties["AutoIncrement"].Value = true;
            table.Columns.Append(column1, DataTypeEnum.adInteger, 9);//增加一个自动增长的字段
            table.Keys.Append("FirstTablePrimaryKey", KeyTypeEnum.adKeyPrimary, column1, null, null);//设置主键
            table.Columns.Append("Accept Order Date", DataTypeEnum.adDate, 20);//add a column of accept order date
            table.Columns.Append("Production Order", DataTypeEnum.adWChar, 10);//add a column of Production Order
            table.Columns.Append("Product Spec", DataTypeEnum.adWChar, 10);//add a column of the product spec
            table.Columns.Append("Product Unit", DataTypeEnum.adWChar, 10);//add a loumun of the product unit
            table.Columns.Append("Product Number", DataTypeEnum.adInteger, 3);//add a column of the product number
            table.Columns.Append("Delivery Date", DataTypeEnum.adDate, 20);//add a column of the delivery date
            cat.Tables.Append(table);

            MessageBox.Show("数据库表：" + "name" + "已经创建成功！");
            cn.Close();  
            
            //connect the databank
            OleDbConnection myConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data source='" + Application.StartupPath + @"\ColdLead.mdb'");
            //insert data to the table         

            string myExecuteQuery = "insert into [orderList]([Accept Order Date],[Production Order],[Product Spec],[Product Unit],[Product Number],[Delivery Date])values(2008-10-10 ,'year','122ls/45r','gr',50,2008-11-20)";
            myConnection.Open();
            OleDbCommand myCommand=new OleDbCommand (myExecuteQuery,myConnection);            
            
            //myCommand.Connection.Open();
            myCommand.ExecuteNonQuery();


            OleDbDataAdapter da = new OleDbDataAdapter("select * from orderList", myConnection);
            //control data with DataSet
            DataSet ds = new DataSet();
            da.Fill(ds);
            //show the data in the dataGridView
            dataGridView1.DataSource = ds.Tables[0].DefaultView;
            //close the databank connect
            myConnection.Close();            
            
            //close the form2            
            form2.Close();            
        }

没人知道？