I installed SME 6.0 for my web-server.  I place all my html files inside /ibays/nisico/html.  I went to server-manager->configuration->domains and i modify my default domain content into nisico ibay.
I also modify the /etc/httpd/conf/httpd.conf.  Below is my correct configuration. 
<VirtualHost 0.0.0.0:443>
    ServerName 
www.nisicooptical.com    ServerAlias nisicooptical.com  web-nisico.nisicooptical.com
    DocumentRoot         /home/e-smith/files/ibays/nisico/html/catalog
    ScriptAlias /cgi-bin /home/e-smith/files/ibays/nisico/cgi-bin
    Alias       /files   /home/e-smith/files/ibays/nisico/files
However, there comes a time that the /etc/httpd/conf/httpd.conf will go back to its default configuration without touching anything the configuration.  
Below is the default configuration:
<VirtualHost 0.0.0.0:443>
    ServerName 
www.nisicooptical.com    ServerAlias nisicooptical.com  web-nisico.nisicooptical.com
    DocumentRoot         /home/e-smith/files/ibays/Primary/html/catalog
    ScriptAlias /cgi-bin /home/e-smith/files/ibays/Primary/cgi-bin
    Alias       /files   /home/e-smith/files/ibays/Primary/files
I don't have any idea how come it goes back to its default config.  Please help me if somebody knows why it works that way.  Thanks...
Nald