Autopostback Is Not Fire Of Dropdown List If I Have C# Code In Script Secion And Design On Same Page (On Aspx)

See more:

ASP.NET

I have an aspx page which contain some dropdowns in those dropdowns autopost of first dropdown is working fine but the autopost back of second dropdown is not working . i have write c# code in aspx page in script section of page means i dont have code behind file i have code and design on same page(aspx). please give me solution to that . why this selectedIndexChanged Event not firing of second Dropdown list . i dont have any ajax code or update pannel on my page still this autopost back is not working .

my code of both dropdown is given bellow one is working fine but second one is not working .

<asp:DropDownList ID="project" runat="server"
AutoPostBack="True" OnSelectedIndexChanged="Project_SelectedIndexChanged" Height="16px">
</asp:DropDownList>
<tr id="row2">
<td nowrap>
<span class="lbl" id="org_label"  runat="server">Organization: </span>
<td nowrap>
<span class="stat" id="static_org"  runat="server"></span>
<asp:DropDownList ID="org" runat="server"
AutoPostBack="True" OnSelectedIndexChanged="org_SelectedIndexChanged" Height="16px">
</asp:DropDownList>

in this project dropdown is working fine but org dropdown do not fire autopost back and not go to define event after selection changed.