Text box and combo box value from Form 2 to From 1

Question

I have some problem

On form 1 make the code

On form2 make public all textboxex

private void button19_Click(object sender, EventArgs e)
{
   artikl_search lupa = new artikl_search();
   lupa.Show();
   idTextBox1.Text = lupa.idTextBox.Text;
   nazivComboBox.Text = lupa.naziv_artiklaTextBox.Text;
   textBox2.Text = lupa.grupa_artikalaTextBox.Text;
   jedinica_mjereTextBox.Text = lupa.jedinica_mjereTextBox.Text;
   kolicinaTextBox.Text = lupa.kolicinaTextBox.Text;
   cijena_bez_pdvTextBox.Text = lupa.cijena_bez_pdvTextBox.Text;
}

On form 2

 

Make textbox and other boxes to be public...but...problem is when I chose values on Form2, 

on Form1 give me always value first row in datagreed...not selected value from Form2

 

Maybe is problem  line 8?

nazivComboBox.Text = lupa.naziv_artiklaTextBox.Text;

Form1 is combo box, on Form 2 is textbox