mod_ssl: Configuring Apache to enable protocol http and https

Hi,
I have a Linux Madriva 2005 with Apache 2. I have installed the
certificates in my server for one of my virtual host. I added inte
virtual hosts configuration this lines:


<VirtualHost 100.100.100.100>
SSLEngine On
SSLCertificateKeyFile /absolute/path/to/my/key
SSLCertificateFile /absolute/path/to/my/certificate
ServerName www.my.server.name
ServerPath /myroot
DocumentRoot /var/www/html
</VirtualHost>


With this configuration the protocol https works fine. The problem is
that when I try to connect to www.my.server.name through http I got the
error page:

Bad Request

Your browser sent a request that this server could not understand.
Reason: You're speaking plain HTTP to an SSL-enabled server port.
Instead use the HTTPS scheme to access this URL, please.

Hint: https://www.my.server.name:80/

....even for the other virtual hosts.
How can I enable the possibility to use both protocol http and https?

Thanks,
Max-B
--
http://www.max-b.org