Here are some stupid things and easily overlooked errors I've done over the years. I post these with the hope that someone else will benifit from my goofs.

OK, according to most explanations, all you need to do is remove the passphrase from your SSL certificate key file.

When that doesn't work, make sure you've included the SSLCertificateKeyFile directive in your httpd-ssl.conf file. If not, you'll get the same "SSLPassPhraseDialog builtin is not supported on Win32" error message.