Print through WinForms

[vlasin]

Hello,

I have a printer named Datecs EP-50.
I have this code:

e.Graphics.DrawString("  NOTA DE PLATA",print10B,Brushes.Black,10,0);
            
            e.Graphics.DrawString(" Masa: ", print8B, Brushes.Black, 8, 35);
            e.Graphics.DrawString(label_pin.Tag.ToString(),print8B, Brushes.Black, 48, 35);
            e.Graphics.DrawString(" Data: ", print8B, Brushes.Black,8 , 50);
            int length = DateTime.Now.Day.ToString().Length + DateTime.Now.Month.ToString().Length + DateTime.Now.Year.ToString().Length + DateTime.Now.ToShortTimeString().Length;
            int length2 = " Data: ".Length + 3;
            e.Graphics.DrawString(DateTime.Now.Day+"/"+DateTime.Now.Month+"/"+DateTime.Now.Year+"  "+DateTime.Now.ToShortTimeString(), print8B, Brushes.Black, length2+length, 70);
            e.Graphics.DrawString("-----------------------------------------", new Font(dataGridView1.Font.FontFamily, 8, FontStyle.Regular), Brushes.Black, 10, 80);
            e.Graphics.DrawString("Produs   | Cant | Pret | Total ", print8B, Brushes.Black, 10, 110);
            int height = 0;
            int x = 10;
            
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                e.Graphics.DrawString(dataGridView1.Rows[i].Cells["DenumireProdus"].Value.ToString(), print6B, Brushes.Black, x, 130+height);
                e.Graphics.DrawString(dataGridView1.Rows[i].Cells["produs_cantitate"].Value.ToString(), print6B, Brushes.Black, x+70, 130 + height);
                e.Graphics.DrawString(dataGridView1.Rows[i].Cells["produs_pret"].Value.ToString() , print6B, Brushes.Black, x+105, 130 + height);
                e.Graphics.DrawString(dataGridView1.Rows[i].Cells["produsvaloare"].Value.ToString(), print6B, Brushes.Black, x + 135, 130 + height);
                height += 20;
                
            }
            e.Graphics.DrawString("-----------------------------------------", new Font(dataGridView1.Font.FontFamily, 8, FontStyle.Regular), Brushes.Black, 10,dataGridView1.Height+_maxPage+_page+46);
            e.Graphics.DrawString("Total:  " + textBox1.Text+" RON", print10B, Brushes.Black,40,dataGridView1.Height + _maxPage+20+_page+55);

My problem is that this code only prints the header and another 7 records. After the 7-th record the printer stops printing. Why does it happening ?