Enabling the required modules
Enable the "frontpage" and "htaccess" modules by ticking them on the module configuration page. Alternatively they will be enabled for you by the installation script. In either case you will need to restart the virtual server to activate the modules.
FrontPage module
Processes FrontPage requests and runs the FrontPage Extension binaries as the correct non-root user.
Htaccess module
FrontPage uses htaccess style access control to prevent unauthorised users from publishing to sites.