If you're trying to use SSL with Apache on the windows platform you *may* have run into issues getting the SSL side of things working.
Assuming you are basing your configuration from the built in config files:
There is a line <IfDefine SSL> that may catch you out.
This will not run any of its contents without you starting the Apache process different to the default way you may have done before.
See http://lists.apple.com/archives/macos-x-server/2006/Mar/msg00982.html