Lighttpd

I'm running sarge and having difficulties enabling CML.

I installed lighttpd_1.4.3-1_i386.deb and enabled mod_cml and created a webpage for testing CML but when accessing http://localhost/index.cml the page is provided as a download instead of a webpage.
The file output.html is only created when calling trigger.php directly, not trough index.cml.

My current setup:

• content of lighttpd.conf which isn't standard:
  

  server.modules = ( "mod_cml", "mod_access", "mod_fastcgi", "mod_accesslog" )
  server.indexfiles = ( "index.cml", "index.php", "index.html" )
  

• contents of index.cml:
  

  output_contenttype = "text/html" 
  
  trigger_handler = "trigger.php" 
  
  -- this file updated by the trigger
  output_include = { "output.html" }
  
  docroot = request[DOCUMENT_ROOT]
  cwd = request[CWD]
  
  -- the dependencies
  files = { cwd .. "input.html" }
  
  cached_mtime = file_mtime(cwd .. "output.html")
  
  -- if one of the source files is newer than the generated files
  -- call the trigger
  for i,v in ipairs(files) do
    if file_mtime(v) > cached_mtime then return 1 end
  end
  
  return 0
  

• contents of trigger.php:
  

  <?php
  
  $content = file_get_contents('input.html');
  file_put_contents('output.html', $content);
  
  ?>
  

-- mailmesuf