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SelectedIndexChanged event does not fire on website only

I have boiled this down to the most simple situation possible.
In a DropDownList_SelectedIndexChanged event, I put some text in a label. (VB.NET, ASPX)
It works testing on the Local Development Server, but not on the website.
AutoPostBack="True" should be OK (it makes the round trip in all cases)
Set the page <%@ OutputCache Duration="1" VaryByParam="none" %> duration as low as possible as per some research, etc. etc., etc.
Why does it work locally and not remotely?
Thanks in advance.
1 Solution
Does the DropDownList have the runat attribute set properly ? Can the control itself be configured from somewhere else than from the page attributes ? Don't you have any security issues with the Web sever ? (is it IIS ?) Is the framework matching on the server machine ?....
TargetGTAuthor Commented:
Framework did not match remote (2.0) ve. local (default 3.5).  Without going into all the details, inherits did not work and codebehind did not run.  Setting the target is somewhat obscure, and even so, VWD 2008 did not give me any warnings, assuming inherits is invalid in 2.0.
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