FindRow no finds string in column

Hello,pleaseadvice.I can notfindstringEURcolumn0 in Infragistics.Win.UltraWinGrid.UltraGrid.Do not knowwhy.When I want tofindvalue in thesecond columnandFindRowworks.I do not understand. Thanks

  var col = 0;
  var value = "EUR";
  var i = ultraGrid1.FindRow(col, value);
  Log.Message("row: " + i);