I have an asp:DropDownList in a user control that appears to be timing out at 20 minutes- even though the web.config is set to 240 (four hours). The post-back thinks that it is coming to the page for the first time (after twenty idle minutes) and does not trigger the selectedIndexChanged event.
I am not using EnableSessionState="True" in the Page directive, because this should be the default.
Here is the current form declaration:
<asp:DropDownList runat="server" CssClass="dropdown45" ID="ddlChangeStates" TabIndex="-1"></asp:DropDownList>
Any ideas? I am testing it with AutoPostBack=true and EnableViewState=true next...
Thanks in advance!