Problem with painting QTable cell

[codebehind]

Hello!

I try to paint special cell (dynamicaly of course) and i get this error for each cell i execute paint on it:
"QGVector::remove: Index -7 out of range"
and the cell does not change color and it is whitout any data.

void UAutomat::PopulateVrednosti(int nRow)
{
   tblRezultat->setText(nRow,0,QString("%1").arg(_ucenje->GetPovKaz(),0,'f',4));
   for(int i=0;i<_ucenje->_igralec.GetMaxAkc();i++)
   {
      if (i== _ucenje->GetAkcija())
      {
         MyItem it(tblRezultat,QTableItem::Never,QString("%1 \%").arg(_ucenje->_igralec.GetVerN(i)*100,0,'f',2));
 
         if (_ucenje->GetKazen()) it.SetBkgColor(Qt::red);
         else it.SetBkgColor(Qt::green);
 
         QColorGroup cg = colorGroup();
         QPainter p(tblRezultat);
         it.paint(&p,cg,tblRezultat->cellGeometry(nRow,i),false);
      }
      else
         tblRezultat->setText(nRow,i+1,QString("%1 \%").arg(_ucenje->_igralec.GetVerN(i)*100,0,'f',2));
   }
 
   tblRezultat->showRow(nRow);
}

void UAutomat::PopulateVrednosti(int nRow)
{
   tblRezultat->setText(nRow,0,QString("%1").arg(_ucenje->GetPovKaz(),0,'f',4));
   for(int i=0;i<_ucenje->_igralec.GetMaxAkc();i++)
   {
      if (i== _ucenje->GetAkcija())
      {
         MyItem it(tblRezultat,QTableItem::Never,QString("%1 \%").arg(_ucenje->_igralec.GetVerN(i)*100,0,'f',2));

         if (_ucenje->GetKazen()) it.SetBkgColor(Qt::red);
         else it.SetBkgColor(Qt::green);

         QColorGroup cg = colorGroup();
         QPainter p(tblRezultat);
         it.paint(&p,cg,tblRezultat->cellGeometry(nRow,i),false);
      }
      else
         tblRezultat->setText(nRow,i+1,QString("%1 \%").arg(_ucenje->_igralec.GetVerN(i)*100,0,'f',2));
   }

   tblRezultat->showRow(nRow);
}

To copy to clipboard, switch view to plain text mode 

tblRezultat is a pointer to QTable

MyItem code is here