Locale character error in testserver while no problem in local server

I wrote a code that works in local env. But it fails in test server . I read data from webservice and show in a grid. Date columns are different in deployed test env from local env. I am reading some data from client side and taking date data from columns and transfer them in form side. I also have local character problem same as working in local but not in deployed test env. What can I do ?
my row command is as follows: I can take v value right in local but not in test env.

    protected void ctlGridSgkTecrube_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        int row = Convert.ToInt32(e.CommandArgument.ToString());
        String v = ctlGridSgkTecrube.Rows[row].Cells[4].Text;
        long meslekKodu = IstOzgecmisBLL.Instance.ReadReadMeslekKodu(v);
        int deneyimSure = Convert.ToInt32(ctlGridSgkTecrube.Rows[row].Cells[5].Text);
        long istIsArayanMevcut = IstOzgecmisBLL.Instance.ReadProfilMeslekKodu(meslekKodu, CurrentUserID);
        isArayanSGKMeslekBE.OZGECMISSGKMESLEK.Select(x => x.PRMMESLEKAD == v);
        this.isarayanMeslekBE = IstIsArayanMeslekBLL.Instance.ReadForOzgecmis(CurrentUserID);
        if (meslekKodu > 0)
        {
            if (istIsArayanMevcut == 0)
            {
                this.isarayanMeslekBE = IstIsArayanMeslekBLL.Instance.ReadForOzgecmis(CurrentUserID);
                IstIsArayanMeslekBE.ISTISARAYANMESLEKRow rowIsArayanMeslek = isarayanMeslekBE.ISTISARAYANMESLEK.NewISTISARAYANMESLEKRow();

                rowIsArayanMeslek.KAYITNO = -1;
                rowIsArayanMeslek.PRMMESLEKKAYITNO = meslekKodu;
                rowIsArayanMeslek.DENEYIMYIL = (int)deneyimSure / 360;
                int kalangun = 0;
                kalangun = (int)(deneyimSure - (rowIsArayanMeslek.DENEYIMYIL * 360));
                rowIsArayanMeslek.DENEYIMAY = (int)kalangun / 30;
                rowIsArayanMeslek.PRMMESLEKOGRENMETURKAYITNO = Convert.ToDecimal(PrmMeslekOgrenmeTurConstants.SgkMeslek);
                rowIsArayanMeslek.ISTPROFILKAYITNO = CurrentUserID;
                //  sgkrow.SGKMESLEKESLESMEDURUM = 1;
                isarayanMeslekBE.ISTISARAYANMESLEK.AddISTISARAYANMESLEKRow(rowIsArayanMeslek);
                IstIsArayanMeslekBLL.Instance.FlushForOzgecmis(isarayanMeslekBE, rowIsArayanMeslek, CurrentUserID);
                RefreshOzgecmisTecrubeUserControl();
            }

            ctlIsyeriMeslek.Text = meslekKodu.ToString();

        }
    }