I am having a strange error with our ASP.NET web application. Ocassionally one of the first people to start work in the morning gets a "page not found" error. See error message details below.

Notes about the error:
- the user is the first person to log into our application in the morning from that site
- in most cases I've logged into the app before him, but from home using my own DSL internet connection
- the error happens after he inputs his usename and password then clicks the login button
- we are using forms authentication
- if the user then surfs back to the login web page and logs in again, the application starts fine

Notes about the environment
- running latest version of the .NET framework
- server is running Windows 2000 Server
- we access the internet via a proxy server at work
- each night use the IISRESET command to stop IIS then do packing and other maintenance, then use IISRESTART to restart IIS

At first I thought if he was the first person from all sites to try to login the loading of ASP.NET and the VFP DLLs caused a timeout, but if I log in from home before anyone, he still gets this error.

Cut and Paste of the error page:

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The page cannot be displayed
The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings.

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Please try the following:

Click the Refresh button, or try again later.

If you typed the page address in the Address bar, make sure that it is spelled correctly.

To check your connection settings, click the Tools menu, and then click Internet Options. On the Connections tab, click Settings. The settings should match those provided by your local area network (LAN) administrator or Internet service provider (ISP).
If your Network Administrator has enabled it, Microsoft Windows can examine your network and automatically discover network connection settings.
If you would like Windows to try and discover them,
click Detect Network Settings
Some sites require 128-bit connection security. Click the Help menu and then click About Internet Explorer to determine what strength security you have installed.
If you are trying to reach a secure site, make sure your Security settings can support it. Click the Tools menu, and then click Internet Options. On the Advanced tab, scroll to the Security section and check settings for SSL 2.0, SSL 3.0, TLS 1.0, PCT 1.0.
Click the Back button to try another link.



Cannot find server or DNS Error
Internet Explorer
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