NumericTextBox Decimals issue in IE9, FF 23

[i.deeds nv]

Hello,

i cannot enter digits after the decimal separator in the UI, apparantly it works in IE10 but not in IE9 and FF
(the version is use is Kendo UI v2013.2.716)

culture is set to "en-US" via web.config globalization

<globalization culture="en" uiCulture="en-US"/>


this is info in the header of the page

       <link rel="stylesheet" href="/assets/styles/kendo.common.min.css" type="text/css" media="all" />
        <link rel="stylesheet" href="/assets/styles/kendo.metro.min.css" type="text/css" media="all" />
        <link rel="stylesheet" href="/assets/css/screen.css" type="text/css" media="all" />
   
        <script type="text/javascript" src="/assets/js/jquery.min.js"></script>
        <script type="text/javascript" src="/assets/js/kendo.all.min.js"></script>
        <script type="text/javascript" src="/assets/js/kendo.aspnetmvc.min.js"></script>
        <script type="text/javascript" src="/assets/js/cultures/kendo.culture.en.min.js"></script>
        <script type="text/javascript" src="/assets/js/cultures/kendo.culture.en-US.min.js"></script>
       
        <script type="text/javascript">
            kendo.culture("en-US");
        </script>

this is the .net code for generating the input element (.net datatype is decimal)

<td>@(Html.Kendo().NumericTextBoxFor(s => s.QuantitativeCost.AdditionalInformation.PaymentToRetailersForEWaste).Decimals(2).HtmlAttributes(new { style = "text-align:right;" }).Spinners(false).Enable(!Model.QuantitativeCost.IsCompleted).Deferred())</td>

can you help me out ? i'm i missing something ?

kind regards,