datagridview doesn't display records - MySQL db

Question

Hello :) I've used a database in SQLSERVER2008, but because i couldn't connect in PHP to sqlserver, i've modified my database, and made it in MySQL. But now my datagridviews doesn't show anything..This is the code i'm using:

private void Form1_Load(object sender, EventArgs e)
        {
            DataSet dataSet = new DataSet();
            BindingSource categdaBS = new BindingSource();


            MySqlConnection conn = null;
            string conStr = "server=localhost;User Id=root;database=asigurari";


            conn = new MySqlConnection(conStr);
            conn.Open();


            MySqlDataAdapter daCategDA = new MySqlDataAdapter("SELECT * FROM categorie_discount_adaos", conn);
            daCategDA.Fill(dataSet, "categorie_discount_adaos");
            categdaGridView.AutoGenerateColumns = false;
            categdaBS.DataSource = dataSet.Tables["categorie_discount_adaos"];
            categdaGridView.DataSource = categdaBS;


            categdaGridView.Columns["cod_categorie"].DataPropertyName = "cod_categorie";
            categdaGridView.Columns["denumire_categorie"].DataPropertyName = "denumire_categorie";
            categdaGridView.Columns["tip_categorie"].DataPropertyName = "tip_categorie";
            categdaGridView.Columns["procent"].DataPropertyName = "procent";
            conn.Close();
        }  
the connection works fine, but i don't know what's wrong, any help?