Rad Listbox Transfer buttons disabled

[Jagat]

Hi,

Buttons associated with the listbox are disabled. Attached a screen shot. Am i missing any setting here?

<telerik:RadListBox runat="server" ID="rlbItemSource" AllowTransfer="true"  AllowTransferOnDoubleClick="true"
           TransferToID="rlbItemTarget" height="150px" Width="200px" TransferMode="Move" SelectionMode="Multiple"  >
    <ButtonSettings ShowTransferAll="true" ShowTransfer="true" ShowReorder="false" />
</telerik:RadListBox>

<telerik:RadListBox runat="server" ID="rlbItemTarget" height="150px" Width="200px"
 TransferToID="rlbItemSource" >
<ButtonSettings ShowReorder="false"   />
</telerik:RadListBox>

 

Thanks in Advance