Enable/disable SSL in virutal hosts

I am trying to configure apache 1.3.33 with modssl2.8.22-1.3.33 on a virual
host but only for a specific directory. I have SSL working for the doc root
for various virtual hosts. I have read through the mod_ssl docs, and
O'Reilly's Apache guide, but I haven't been able to get it to work. 

Specifically, for the servername sam, when a browser hits the DocumentRoot,
I want to ensure that SSL is not invoked (just for performance reasons) but
when a user hits /admin, then SSL must be invoked. I have tried various
tweaks to no avail (the virtual host section is below). I know that I am
using the correct httpd.conf file because when I fat finger a directive, and
stop and start apache, I get an error. Changes to SSLEngine off|on seem to
have no effect.

Any ideas, thanks.


NameVirtualHost 192.168.10.50:80



# Disable SSL first
SSLEngine off

<VirtualHost 192.168.10.50:80>
        SSLEngine off
        ServerAdmin root@localhost
        DocumentRoot /www/htdocs
        ServerName storage
        ErrorLog logs/error_log
        CustomLog logs/access_log combined
</VirtualHost>

<VirtualHost 192.168.10.50:80>
        SSLEngine off
        ServerAdmin root@localhost
        DocumentRoot /www/sam
        ServerName sam
        ErrorLog logs/sam_error_log
        CustomLog logs/sam_access_log combined
</VirtualHost>

<VirtualHost 192.168.10.50:443>
        SSLEngine on
        ServerName sam
        DocumentRoot /www/sam
        SSLCertificateFile /www/conf/ssl.crt/sam.cert
        SSLCertificateKeyFile /www/conf/ssl.key/sam.key
        SSLVerifyClient 0
        ErrorLog logs/sam_error_log
        CustomLog logs/sam_access_log combined

        <Directory "/www/sam/admin">
                SSLRequireSSL
                SSLOptions +StrictRequire
#               AuthType basic
#               AuthName admin
#               AuthUserFile /www/auth/admin-users
#               AuthGroupFile /www/auth/groups
#               require valid-user
        </Directory>
</VirtualHost>

<VirtualHost 192.168.10.50:80>
        SSLDisable
        ServerAdmin root@localhost
        DocumentRoot /www/mike
        ServerName mike
        ErrorLog logs/mike_error_log
        CustomLog logs/mike_access_log combined
</VirtualHost>

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