Method Error 500 and AJAX

I'm using the cascading drop down provided by the AJAX control toolkit.  I started getting a "[method error 500]" in one of my drop downs a few months ago.  At the time I thought it was bad data and after I removed some of the dups all was fine.  Well, the problem came back recently and I determined all the data was accurate.  So, I began debugging through the problem.  After I got some more details from Fiddler and debugging, I was able to find this post that fixed the issue.  Kudos to Simon Harriyott.

My work here is done.

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