As AM stated, find the httpd.conf section that controls the htdocs section:

<Directory "/usr/local/apache/htdocs">
        .
        .
    AllowOverride None
        .
        .
</Directory>
[download]

and change "None" to the combination you want. Minimally:

    AllowOverride AuthConfig
[download]

Be sure you get the htdocs section, you probably don't want to mess with the section:

<Directory />
    Options FollowSymLinks
    AllowOverride None
</Directory>
[download]

--Jim