Please check to see that you are connected to the internet first.
Downloading via a mobile network could take a long time depending on signal strength and location.
If you have a good connection to either a mobile network or WiFi then check your download folder or desktop to make sure the file hasn't already downloaded in the background.
If you are successful in downloading and opening PDFs from other sites, but the problem persists on a Boom Boom Go class, please get in touch with us.
If you are still having problems, please email us at firstname.lastname@example.org