java SQL error

    public void ConnectToDatabase(){
        try {

             // SET CONNECTIONSTRING
             Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
             String username = "sa";
             String password = "123";
             Connection DbConn = DriverManager.getConnection("jdbc:jtds:sqlserver://SERVER-PC:1433/PRU;user=" + username + ";password=" + password);

             Log.w("Connection","open");
             Statement stmt = DbConn.createStatement();
             ResultSet reset = stmt.executeQuery(" select * from users ");


             EditText num = (EditText) findViewById(R.id.displaymessage);
             num.setText(reset.getString(1));

             DbConn.close();

            } catch (Exception e)
            {
            Log.w("Error connection","" + e.getMessage());
            }