Generally, this is because the the filtering in your school does not allow access to and

First, please ensure your Proxy/Filtering/Firewalls can access MP3, XML and SWF files from and

Alfiesoft strongly advise using a wildcard url *

We also use Google Analytics to collect anonymized, aggregated usage data to help us understand how the AlfieCloud is used and improve its performance.
Please also ensure that ( ) has been white-listing.