What happens if you take your URL: http:localhost:3001/account/create.json
and paste it into the address bar in Firefox and then hit Enter? Do you see it add something that was missing? :-) BTW, I assume your app is running on localhost:3001, is that right? I'd suggest using a relative URL instead, e.g.: /account/create.json That way you won't have to change your code if you move your app to a different server. -Mike > From: Alexander Cabezas > > Hi. > > When i try to make an ajax request like: > $.get( "http:localhost:3001/account/create.json", SignUp.onComplete ); > > I get the following error in the firebug ( Net ): > OPTIONS - 405 Method Not Allowed > > Is it related to cross-domain request?.