[Solved] Why length of item list in dropdownlist decrease each time it is opend

[york]

Hi,

I use dropdownlist in Telerik MVC application. There is a strange problem in dropdownlist. In 1st time dropdownlist is opened, the length of textbox is the same as that of items list which is correct (see Initial Droopdown List.jpg attached). However, each additional time it is opened, the length of items list decreases by some length (see Dropdown List Problem.jpg attached). The code is,

<div style="float:left;width:46%;text-align:right;padding:0px 0px 0px 0px;">
     <%: Shared.SharedStrings.YearSelector_ForYear %>:
 </div>
 <div style="float:right;width:50%;text-align:left;margin:0px 0px 0px 0px;">

     <%= Html.Telerik().DropDownList()
         .Name("YearSelector")
             .HtmlAttributes(new { style = "width:120px;font-size:12px" })
         .SelectedIndex(Model.SelectedYearIndex)
         .Enable(ViewData["Enable"] == null ? true : (bool)ViewData["Enable"])
         .BindTo(new SelectList(Model.OlympicYears))
                 .ClientEvents(e => e.OnChange("changeYear"))

     %>

I am totally lost as how can that happen. Please help.

Thanks,
York