You can also help aolserver by adding mime types in the
ns/mimetypes section of your configuration file:
ns_section "ns/mimetypes"
ns_param default "*/*" ;# MIME type for unknown extension.
ns_param noextension "*/*" ;# MIME type for missing extension.
ns_param ".xls" "application/vnd.ms-excel"
ns_param ".doc" "application/msword"
I don't think MS Office file extensions are included in the default mime types known by aolserver.