Using Aliases with VirtualDocumentRoot doesn't work

Hi

I've set up a Debian development server here at home. The aim was to
provide an easy way to access all my projects by using a URL like

<project>.dev.emeidi.local

I therefore set up BIND the correct way and added the following lines
to httpd.conf, at the bottom:

VirtualDocumentRoot /var/www/%1
VirtualScriptAlias /var/www/cgi-bin/

There are some directories I'd like to show its content as listing. I
therefore created a .htaccess-File with the following settings:

Options Indexes

IndexOptions +FoldersFirst
IndexOptions +NameWidth=48
IndexOptions +SuppressColumnSorting
IndexOptions +SuppressDescription

The listing appears, but the icons aren't being displayed, a broken
image appears instead. When looking at the error.log, it says:

[Mon Oct 4 17:06:26 2004] [error] [client 192.168.0.102] File does not
exist: /var/www/project/icons/sound2.gif

Well, but I remember there was this Alias-setup in httpd.conf which says:

<IfModule mod_alias.c>
Alias /icons/ /usr/share/apache/icons/

<Directory /usr/share/apache/icons>
Options Indexes MultiViews
AllowOverride None
Order allow,deny
Allow from all
</Directory>

Why is this Alias not resolved?

Should be correct. Any clues?

Thanks for any help
Kind regards
Mario