No button click when the Asp button placed in Kendo Window

[Rohit]

Hi,

Below is the code where i use kendo window to show a window where user can enter email address and on clicking send it fires c# button click event.
But that doesn't happen, the button click event doesn't fires. What could be the issue??
Also to make avoid other problems, i have set the causesvalidation to false.

<div id="Emailwindow">
        <div id="mainPart">
        <fieldset>
        <legend><asp:Literal ID="ltrlLegendText" runat="server"></asp:Literal></legend>
        <table cellspacing="10">
            <tr>
                <td colspan="2" align="center">
                    <asp:Label ID="lblmsgtoShow" EnableViewState="false" runat="server" Text=""></asp:Label>
                </td>
            </tr>
            <tr>
                <td align="right">
                    <span class="redstar">*</span>
                    <asp:Label ID="lblEmail" runat="server" Text="Your Email ID:">
                    </asp:Label>
                </td>
                <td><asp:TextBox ID="txtSendEmail" EnableViewState="false" Width="250px" runat="server"></asp:TextBox></td>
                     
            </tr>
            <tr>
                <td></td>
                <td><span id="EmailMsg" enableviewstate="false" runat="server"></span></td>
            </tr>
            <tr>
                <td></td>
                <td align="left">
                    <span class="mandatoryMsg">Fields marked (<span class="redstar">*</span>) are mandatory</span>
                </td>
            </tr>
            <tr>
                <td></td>
                <td align="right">
                    <asp:Button ID="btnSendEmail" CausesValidation="false" runat="server"
                        Text="Send" Width="80px" onclick="btnSendEmail_Click" />
                </td>
            </tr>
        </table>
        </fieldset>
    </div>