I got an error like this while copying from access to sql 'Could not find installable ISAM.'

try
          {
              cn1 = new SqlConnection(con);
              if (cn1.State != ConnectionState.Open) { cn1.Open(); }
              cmd1 = new SqlCommand("Create database " + db + "");
              cmd1.Connection = cn1;
              cmd1.ExecuteNonQuery();
              con += ";Driver=SQL Server;database='" + db + "'";
          }
          catch (Exception Ex) { }
          try
          {
              DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
              DataTable userTables = null;
              using (connection)
              {
                  string mappath = dataGridView1.CurrentRow.Cells["Path"].Value.ToString();
                  string[] filePaths = Directory.GetFiles(@"" + mappath + "", "*.mdb", SearchOption.TopDirectoryOnly);
                  // c:\test\test.mdb
                  foreach (string tr in filePaths)
                  {
                      connection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + tr + "";
                      string[] restrictions = new string[4];
                      restrictions[3] = "Table";
                      connection.Open();
                      userTables = connection.GetSchema("Tables", restrictions);
                      List<string> tableNames = new List<string>();
                      for (int i = 0; i &lt; userTables.Rows.Count; i++)
                          tableNames.Add(userTables.Rows[i][2].ToString());
                      try
                      {
                          foreach (string tableName in tableNames)
                          {
                              OleDbCommand cmd = new OleDbCommand("select * into ["+con+"].["+tableName+"] from [" + tableName + "]");      // Got error Here
                              cmd.Connection = connection;
                              cmd.ExecuteNonQuery();
                          }
                      }
                      catch (Exception Ex) { connection.Close(); }
                      connection.Close();
                  }
              }
          }
          catch (Exception Ex) { }