C# BackgroundWorker Class problem

private void btnStartCurrencyConverter_Click(object sender, EventArgs e)
        {
            if (!bwCrawler.IsBusy)
                bwCrawler.RunWorkerAsync();
        }

        private void CurrencImport()
        {
            CurrencyWS.CurrencyConvertorSoapClient client = new CurrencyApp.CurrencyWS.CurrencyConvertorSoapClient();

            string[] curr1 = Enum.GetNames(typeof(CurrencyWS.Currency));
            string[] curr2 = Enum.GetNames(typeof(CurrencyWS.Currency));
            int i = 0;
            int j = 0;
            int k = 0;

            foreach (var c1 in curr1)
            {
                foreach (var c2 in curr2)
                {
                    try
                    {
                        CurrencyWS.Currency cEnum1 = (CurrencyWS.Currency)Enum.Parse(typeof(CurrencyWS.Currency), c1);
                        CurrencyWS.Currency cEnum2 = (CurrencyWS.Currency)Enum.Parse(typeof(CurrencyWS.Currency), c2);
                        double rate = client.ConversionRate(cEnum1, cEnum2);

                        ICurrenciesDao currenciesDao = DaoFactory.GetCurrenciesDao();

                        Currencies currencyExist = currenciesDao.GetConversionRateByFromCurrencyToCurrency(c1, c2);

                        if (currencyExist != null)
                        {
                            // update if row exist
                            currencyExist.ConversionRate = Convert.ToDecimal(rate);
                            currenciesDao.SaveOrUpdate(currencyExist);
                            currenciesDao.CommitChanges();

                            lblNumberOfUpdatedRows.Text = i.ToString();
                            i++;
                        }
                        else
                        {
                            // write new row
                            Currencies currencyNew = new Currencies(c1, c2, Convert.ToDecimal(rate), DateTime.Now);
                            currenciesDao.Save(currencyNew);

                            lblNumberofNewRows.Text = j.ToString();
                            j++;
                        }

                        txtStatus.Text = c1 + " " + c2 + ": " + rate;
                    }
                    catch
                    {
                        lblNumberofErrorRows.Text = k.ToString();
                        k++;
                    }
                }
            }
        }

private void bwCrawler_DoWork(object sender, DoWorkEventArgs e)
        {
            CurrencImport();
        }