There was an exception running the extensions specified in the config file. ---> System.Web.HttpException: Maximum request length exceeded.

That says to adjust it in the config file. Have you looked that up?

Here, try this:

In the Web.config file, override the value of maxRequestLength for the application. For example, the following entry in Web.config allows files that are less than or equal to 8 megabytes (MB) to be uploaded:

<httpRuntime maxRequestLength="8192" />



Which I found at this site:
http://support.microsoft.com/default...;en-us;Q295626