router.rb match and :format problem

I have following request via method GET:

http://localhost:3000/check/car/8C9BB87/43.21335/27.9023316666667/1...

So information from this request grouped in this way:

  :controler - check
  :action - car
  :uniqid - 8C9BB87
  :latitude - 43.21335
  :longitude - 27.9023316666667
  :timestamp - 1291808804
  :seq - 3

I wrote the following match rule in routes.rb:

match "check/car/:car_number/:gps_location_latitude/:gps_location_longitude/:gps_location_timestamp/:seq", :controller => :check, :action => :car

Output from rake routes:

/check/car/:car_number/:gps_location_latitude/:gps_location_longitude/:gps_location_timestamp/:images_count(.:format) {:action=>"car", :controller=>"check"} 

but when try to hit this controller

curl http://localhost:3000/check/car/8C9BB87/4321.335/279023316.666667/1291808804/3

I receive:

No route matches /check/car/8C9BB87/4321.335/279023316.666667/1291808804/3

When I remove '.' from url all is ok, the problem seems to be in :format, but i don't know how to avoid or disable :format checking.