Can't preselect combobox item using API

Hi Team.

We’re using:
Product Name: dhtmlxSuite
Version: 4.1.2
Edition: Professional

Problem: Can’t preselect combobox item using any of api methods: setComboValue() or selectOption().

Sample Code:
// DHTMLXGrid with columns types as this “ro,ch,combo,combo,combo,combo,combo,combo,combo,combo,combo”

// After grid is created

// Data into grid loaded via API methods

	var newRowId = 'test01';
	var colIndex = 2;

	var rowValues = new Array();
	rowValues[rowValues.length] = 'Test Row';
	rowValues[rowValues.length] = 1;


	// Add a new row into grid
	gs_grid.addRow(newRowId, rowValues);

	var combo = gs_grid.cells(newRowId, colIndex).getCellCombo();

	combo.addOption('0', '');
	combo.addOption('1', 'One');
	combo.addOption('2', 'Two');


	var optionIndex = combo.getIndexByValue('1');
	console.info('optionIndex:'+optionIndex); // this returns "optionIndex:1"

	//Neither of the below two methods selects option "One"
	combo.selectOption(optionIndex, false, true); // By index
	combo.setComboValue('1'); // By value
	
	
	If I now double click cell - I have correct list of values - but I can't make it to pre-select required value. 

Please help.
It’s very importent for us to proceeed.

Thanks in advance.

Please, try to use the setValue() method of the dhtmlxGrid to set the value to a cell:
mygrid.cellById(row_id,col_ind).setValue(value)