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Blank page on ASP.NET 4.0 and IIS 7.5

I have an ASP.NET 4.0 webapp that runs fine locally on IIS 7.5 and Windows 7. But when I deploy it to a Windows Server 2008 R2 server and try to hit a page, all I get is blank. When I view source I get this:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<META content="text/html; charset=windows-1252" http-equiv=Content-Type></HEAD>

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I tried creating and hitting a simple html page in the root of the webapp. Same result: blank.
I tried hitting a nonexistent page, just shows blank--no 'page not found' error or similar.
At first I had a web.config error, and that error was displayed through the page. Once I fixed that config error, I just get the blank page.

Here's what I've already verified:
IIS 7.5 is installed and running
ASP.NET & static content server is installed
Friendly HTTP error messages are disabled, so I should see real error messages from server
custom errors are disabled via web.config
permissions are wide open on the folder containing the asp.net files

Any ideas?
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1 Solution
ASP.NET 2.0 and ASP.NET 4.0 should be installed on the server. Also the application pool for website should be running with ASP.NET 2.
SweatCoderAuthor Commented:
I'm running asp.net 4.0. Why would I want the app pool to run on 2.0 when it can run on 4.0?

I jerked around with this a bunch more and finally got it working. I think it was related to Windows Auth in IIS being disabled, and I needed it enabled. Very strange symptom for this: blank page.

Anyway, I think I may just request this be closed.
SweatCoderAuthor Commented:
I'd like to close this out...
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