jQuery. Using json data on remote server fails

I am working with json data together with jQuery. It works perfectly fine when using a local json file, but shows just a blank page when using a remote json file from another server (even when using a complete URL from my own server). This works: ``` $.getJSON('9.json', function(data) { ``` Does does not work: ``` $.getJSON('http://beta.ambadoo.com/users/9.json', function(data) { ``` Does anyone know how to fix it? Thanks!