Microsoft JScript runtime error: ASPx is undefined
<p>I'm getting this error all over the place in my web application and trying to figure out why. </p>

<p>The error is always for some control, ASPxClientTextBox for example. So far the only thing I've found as a potential fix is to check the httphandlers section of the .net web.config (the one in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG\web.config) and make sure an entry for "WebResource.axd" exists, which it does.</p>

<p>Any idea's what's going on or where I should look?</p>
