Could not load file or assembly 'AjaxControlToolkit,
<pre><code>&lt;tt:TooltipExtender ID="teAutoServiceShutdown" TargetControlID="cbAutoServiceShutdown"
</code></pre>

<p>Parser Error Message: Could not load file or assembly 'AjaxControlToolkit, Version=3.0.20820.16598, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)</p>

<p>what to do?</p>
