>After more research, I found this page as a reference:
>
>http://msdn.microsoft.com/en-ca/library/e1f13641(v=vs.85).aspx
>
>The solution was to move over the 4 MB limit of data being sent. I put maxRequestLength="204800" to cover up to 50 MB.
>
>This resolved the issue.

Interesting. So what was the actual exception type? - the docs state that WebRequest() only throws WebException exception and I would have thought that would contain : (0x80004005): Maximum request length exceeded.

BTW If you are putting such an high limit I'd suggest limiting its scope to the relevant page - and even then make it no bigger than it needs to be in practice.