dropdown not working

I have a drop down list box that does not post back properly. When the drop down list item changes the OnSelectedIndexChanged event triggers it run the Page_Load subroutine with no problems, but it does not run the ddDetails_SelectedIndexChanged subroutine like it's suppose to. Does anyone know why? All my other drop downs work fine. I don't know what's happening. I do not get a run-time error. Drop down code is below

webcontrol:
<asp:dropdownlist id="ddDetails" runat="server" OnSelectedIndexChanged="ddDetails_SelectedIndexChanged" AutoPostBack="True">

code behind:
Sub ddDetails_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
getIt()
End Sub

James

try adding this to the end of your sub line

Code:

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Handles ddDetails.SelectedIndexChanged

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