There is no page at /proposal2009/.
This server is providing Act - A conference toolkit. Act has been created by French Perl Mongers and is now developed by volunteers from all over Europe. This installation runs on a fork of the original software.
A developer installation should have the Demo conference available.
You might also want to have a look at the Act Manual for this fork.
Site admins may override this error page by creating a directory $ACTHOME/static and creating a template error404 in that directory.