lighttpd forum lighty > IP Range problem

I'm trying to set a whilelist for a site I manage:

$HTTP["host"] == "obfuscated.org" {
  server.name = "obf"
  server.document-root = var.wwwbase + server.name
  server.errorfile-prefix = server.document-root + "/err/"
  accesslog.filename = "| " + var.exec_multilog + var.logbase + "/" + 
server.name + "/access"

  #------------------------------------------------------------
  # auth

  auth.backend = "htdigest"
  auth.backend.htdigest.userfile = var.wwwbase + server.name + ".passwd"
  auth.require = (
    "/cgi-auth/" => (
      "method" => "digest",
      "realm" => "obf",
      "require" => "valid-user",
    )
  )

  #------------------------------------------------------------
  # cgi

  $HTTP["url"] =~ "^/cgi-auth" { cgi.assign = ("" => "") }
  $HTTP["url"] =~ "^/cgi-anon" { cgi.assign = ("" => "") }

  # access
  $HTTP["remoteip"] !~ "79.72.0.0/13|66.246.193.214" { url.access-deny = 
("") }

  #------------------------------------------------------------
  # rewrites

  url.rewrite-once = (
    "^/anon/(.*)" => "/cgi-anon/mt-anon/$1",
    "^/auth/(.*)" => "/cgi-auth/mt-auth/$1",
  )
}


The access control doesn't seem to be working. I can connect to the
site from 66.246.193.214 without problems, but nothing in the
79.72.0.0/13 seems to be able to. I'm not doing any access control
anywhere else in my configuration.

Any ideas what could be causing this?