выражение объединения не поддерживаются

OleDbDataAdapter da1 = default(OleDbDataAdapter);
            BindingSource bs1 = new BindingSource();
            DataSet ds1 = new DataSet();
            DataTable DT = new DataTable("mmm");
            OleDbConnection dcon = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=D:\\pro\ba\\pu\\pu.mdb"); 
            OleDbCommand dcmd = new OleDbCommand();
            dcmd.Connection = dcon;
cmd00="SELECT aa1.famil,aa1.imya,aa2.nomer FROM aa1 INNER JOIN aa2 ON aa1.famil=aa2.famil"
            dcmd.CommandText = cmd00;
            dcmd.Connection.Open();
            try {
                dcmd.ExecuteNonQuery();
                } catch (System.Exception ex) {
                MessageBox.Show(ex.Message);                
                return;
                }
            da1 = new OleDbDataAdapter(cmd00, dcon);
            da1.Fill(DT);
            bs1.DataSource = DT;
            bindingNavigator1.BindingSource = bs1;
            dataGridView2.DataSource = bs1;

string connect = @"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=D:\\pro\ba\\pu\\pu.mdb";
string query = "SELECT aa1.famil,aa1.imya,aa2.nomer FROM aa1 INNER JOIN aa2 ON aa1.famil=aa2.famil";
Dataset ds = new Dataset();
new OleDbDataAdapter(query, connect).Fill(ds);
dataGridView2.AutoGenerateColumns = true;
dataGridView2.DataSource = ds.Tables[0].DefaultView;

new OleDbDataAdapter(query, connect).Fill(ds);