Problem with Windows Store

Hi, I installed your great plugin on my WordPress test blog but I get a problem. As you can see here (http://www.billia.net/?p=148) the output for Windows app is not working. I am using this shortcode: [appbox windowsstore 9nblggh1jj9h] This is exactly the same shortcode used in this page (http://www.winbeta.org/news/slack-beta-for-windows-phone-gets-a-bunch-of-enhancements-and-fixes)) where output is ok. What is the problem?

I would like to notice you that if I activate the plugin debug system I get the following error:

Access Denied

You don’t have permission to access “http://www.microsoft.com/en-us/store/apps/app/9nblggh1jj9h” on this server.

Reference #18.643d1602.1442320003.3c43482

Is my server blacklisted by Microsoft servers? Or it depends on other issue?

Hoping to receive a prompt and useful reply from you 🙂

https://wordpress.org/plugins/wp-appbox/