Hello,
I'm having couple of RadComboBoxes in my page and one of it is not firing the selectedindexchanged event when the first item is selected. If I select the second list item, the event is firing. Here is my code:

<tel:RadComboBox ID="rcbArea" runat="server" Height="110px" DropDownAutoWidth="Disabled" Width="213px"
                                AutoPostBack="true" HighlightTemplatedItems="true"
                                AppendDataBoundItems="true"
                                EmptyMessage="Select Area"
                                Localization-CheckAllString="Select All"
                                Localization-AllItemsCheckedString="All Divisions Selected"
                                Font-Italic="false"
                                CheckBoxes="true" EnableCheckAllItemsCheckBox="true"
                                OnSelectedIndexChanged="rcbArea_SelectedIndexChanged">
                                <ExpandAnimation Type="OutQuart" Duration="500" />
                                <CollapseAnimation Type="OutQuint" Duration="300" />
                            </tel:RadComboBox>

Hi Pradeep,

Please have a look into this forum thread which discuss about the same scenario.

Thanks,
Shinu.