Any ideas why selecting the first item in a SqlDataSource-bound RadComboBox would not trigger the OnClientSelectedIndexChanging event, but the other items would?
<telerik:RadComboBox ID="rcbContractNumber" Height="150px" runat="server" Width="400px" DataSourceID="sqlContracts" DataTextField="Name" DataValueField="ContractNumber" AllowCustomText="true" MarkFirstMatch="true" OnClientSelectedIndexChanging="LoadContractServices" OnClientLoad="rcbContractNumber_Load" ></telerik:RadComboBox>