Select Fire Event not displaying the selected record

Hi All,

I have a requirement of populating the selected record of one combobox to other combobox.

So I' am passing the value like this :-

var comboDown = Ext.ComponentQuery.query('combobox[itemId=filterColDataType]')[0];

comboDown.fireEvent('select',combobox);

I' am getting the 2 combobox's and then I' am firing the select event with the data of 1 combobox.

It is working but the problem is the value is not populating in the 2 combobox means 2 combobox is having the values but not displaying the selected index.

Thanks for the help in advance.

Select Fire Event not displaying the selected record