Hi I am trying to upload PDFs to EasyDnn News module but having real problems.

The process just times out despite the PDF only being about 7-10 meg and setting all the config setting to very high limits.
I am working with DNN 7 on a virtual web server sitting behind a firewall could that be the issue?, need a solution as I have a lot to upload..

Stuart

 Thisis the eventual screen message after trybing to upload a 7 meg file

The connection was reset  
 The connection to the server was reset while the page was loading.
  The site could be temporarily unavailable or too busy. Try again in a few
    moments.
  If you are unable to load any pages, check your computer's network
    connection.
  If your computer or network is protected by a firewall or proxy, make sure
    that Firefox is permitted to access the Web.

Web config.
<httpRuntime shutdownTimeout="120" executionTimeout="1200" useFullyQualifiedRedirectUrl="true" maxRequestLength="42288" requestLengthDiskThreshold="42288" requestValidationMode="2.0" />

<system.webServer>
        <security>

            <requestFiltering>

                <requestLimits maxAllowedContentLength="6000000" />

            </requestFiltering>

        </security>

This is happening within file manager too, it just spins trying to upload a fairly small file. If anyone has any suggestions I am getting desperate as I have 500 meg of files to upload .