ComboBox Drop down list displaying to much information

I have a DataSet (filled with data from SearchFunction.ListLookup). I
have also a EpiComboBox with DataSource and DisplayMember from DataSet.

My problem is - when clicking the combo, then on the list it shows ALL
columns instead of two which I want to display.

I was trying to use
MyComboBox.Rows.Band.Columns(1).Hidden = True
MyComboBox.Rows.Band.ColHeadersVisible = False

But it doesn't work. So I am stuck.

Grzegorz Szczepański