restfull authentification


When I open an authentification page in firefox my login-password are accepted in a web formulary.

In Internet explorer I have a window (authentification popup of windows?) to fill. The same login-password don't pass. (OS : Vista). on the other hand if I push cancel button in this window I come back in a web formulary as with firefox, then I can pass the authentification.

Is there any ROR configuration for remove the authentification window on IE?