URL variables & Boost

Hi!

I have a view that gets its variables through the url. For example:
http://www.====.de/veranstaltungen?filter0=&filter1=&filter2=heute&filter3=
http://www.====.de/veranstaltungen?filter0=289&filter1=&filter2=heute&fi...

The problem is that Boost is not loading the cached versions of these sites.

Boost is loading the cached version of the site 'http://www.====.de/veranstaltungen', but not the ones with variables in their url. These are always shown 'live'.

OK, looking in the boost cache folder, I can find the following files:
veranstaltungen_filter2=heute.html
veranstaltungen_filter0=289&filter2=heute.html

So Boost is indeed caching the sites, but can not find them if the full url with the empty filters (http://www.====.de/veranstaltungen?filter0=&filter1=&filter2=heute&filter3= | http://www.====.de/veranstaltungen?filter0=289&filter1=&filter2=heute&fi...) are called.

Any ideas how I can get Boost to load the cached versions of these sites?

===
My htaccess

 ### BOOST START ###
  AddDefaultCharset utf-8
  <FilesMatch "(\.html|\.html\.gz)$">
    <IfModule mod_headers.c>
      Header set Expires "Sun, 19 Nov 1978 05:00:00 GMT"
      Header set Cache-Control "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
    </IfModule>
  </FilesMatch>
  <IfModule mod_mime.c>
    AddCharset utf-8 .html
    AddCharset utf-8 .css
    AddCharset utf-8 .js
    AddEncoding gzip .gz
  </IfModule>
  <FilesMatch "\.html\.gz$">
    ForceType text/html
  </FilesMatch>
  <FilesMatch "\.css\.gz$">
    ForceType text/css
  </FilesMatch>
  <FilesMatch "\.js\.gz$">
    ForceType text/javascript
  </FilesMatch>

  # GZIP - Cached css & js files
  RewriteCond %{HTTP:Accept-encoding} !gzip
  RewriteRule .* - [S=2]
  RewriteCond %{DOCUMENT_ROOT}/cache/gz/%{SERVER_NAME}%{REQUEST_URI}_\.css\.gz -s
  RewriteRule .* cache/gz/%{SERVER_NAME}%{REQUEST_URI}_\.css\.gz [L,QSA,T=text/css]
  RewriteCond %{DOCUMENT_ROOT}/cache/gz/%{SERVER_NAME}%{REQUEST_URI}_\.js\.gz -s
  RewriteRule .* cache/gz/%{SERVER_NAME}%{REQUEST_URI}_\.js\.gz [L,QSA,T=text/javascript]

  # NORMAL - Cached css & js files
  RewriteCond %{DOCUMENT_ROOT}/cache/%{SERVER_NAME}%{REQUEST_URI}_\.css -s
  RewriteRule .* cache/%{SERVER_NAME}%{REQUEST_URI}_\.css [L,QSA,T=text/css]
  RewriteCond %{DOCUMENT_ROOT}/cache/%{SERVER_NAME}%{REQUEST_URI}_\.js -s
  RewriteRule .* cache/%{SERVER_NAME}%{REQUEST_URI}_\.js [L,QSA,T=text/javascript]

  # Caching for anonymous users
  # Skip boost IF not get request OR uri has wrong dir OR cookie is set OR request came from this server OR https request
  RewriteCond %{REQUEST_METHOD} !^GET$ [OR]
  RewriteCond %{REQUEST_URI} (^(admin|cache|misc|modules|sites|system|themes|node/add))|(/(comment/reply|edit|user|user/(login|password|register))$) [OR]
  RewriteCond %{HTTP_COOKIE} DRUPAL_UID [OR]
  RewriteCond %{HTTPS} on
  RewriteRule .* - [S=3]

  # GZIP
  RewriteCond %{HTTP:Accept-encoding} !gzip
  RewriteRule .* - [S=1]
  RewriteCond %{DOCUMENT_ROOT}/cache/gz/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.html\.gz -s
  RewriteRule .* cache/gz/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.html\.gz [L,T=text/html]

  # NORMAL
  RewriteCond %{DOCUMENT_ROOT}/cache/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.html -s
  RewriteRule .* cache/%{SERVER_NAME}%{REQUEST_URI}_%{QUERY_STRING}\.html [L,T=text/html]

  ### BOOST END ###