Why does a server certificate on Win2k crash my Web site?

I have been trying to install a server certificate on my Windows 2000 server machine to enable SSL and 128-bit encryption, and it crashes my whole Web site. After unchecking 128-bit, it still doesn't work. Then, after unchecking SSL, it works, which makes the certificate useless. Have you seen this before, or do you have any ideas?
I've not see this in Windows 2000, although I can find references to SSL problems and NT 4.0. Is the certificate an SSL cert? Can you make it work on a plain vanilla Windows 2000/IIS server that does not have your Web site loaded? If the certificate does work then, look at your web applications.
This was first published in June 2003

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