ASP Upload Problems

I'm using a pure ASP upload script to handle file uploading. We run IIS6 and I'm aware of the AspMaxRequestEntityAllowed variable in the metabase. I upped this to allow the file size maximum and it was working for the past couple months. Now all of a sudden in the past couple of days we are seeming to have problems.

The upload works fine for anything up to around 2mb (or so it seems).

When uploading about 20mb worth (10x2mb files), I get the following error (thrown from firefox). I tried changing Response.Expires, Server.ScriptTimeout, and the connection timeout setting for the website in IIS.

Connection Interrupted
The connection to the server was reset while the page was loading.
The network link was interrupted while negotiating a connection. Please try again.

When uploading about 2-10mb worth of files, I get an error thrown by ASP. The error typically just means that AspMaxRequestEntityAllowed needs to be increased, but since I've already increased it as high as it can go, I'm really confused.

Request object error 'ASP 0101 : 80004005'
Unexpected error
/scripts/update/ShadowUploader.asp, line 58
The function returned |.

Line 58

What OS are you using? This may apply:
ASP Request.BinaryRead Method Causes 100 Percent CPU Utilization.

The server runs Windows 2003. That's not really the case because the pages this happens on are not public, so we're not worried about end case stuff. This happens when you wait for the page to completely load.