I'm trying to develop a webapp for an intranet application (meaning that
bandwidth isn't an issue) that creates a large file, which takes a while.  
Basically the app runs about 8 stored procedures, dumps all of the output
into a file, and does a Response.Redirect to that file.  This worked well
before when I was creating a much smaller file, but this process takes about
5 minutes to complete and creates about a 15mb file.  Everything goes fine
for a while, but then IE pops up a login & password box, which is really
weird, but I think it basically gives up waiting for the page to load while
all of the stuff is running, and never makes it to the Response.Redirect.  
The interesting thing is that if I check in the folder after about 5 minutes,
the file is there and complete.  It's just a matter of getting IE (or
ASP.Net, I'm not sure which is timing out, but I have increased the
SessionState timeout to 20 min) to stop from timing out before the redirect
happens.  Thanks.