Why I can't launch Blackberry App World?

I have Blackberry Curve 8520 with Blackberry OS 5. I had to download App World via PC as third-party application. When I'm trying to launch it, it says: Your system administrator is preventing you from using Blackberry App World. Contact your system administrator for details. I asked same type of question as guest and it got replied with another question. "Do you have BES enabled? Do you have BIS?" something like that. I have no any idea what are they talking about, because I used to have Nokia, Samsung and after these I started preferring Android phones. I need some help with this.

I av a Blackberry priv and cannot download Bb world from my plays tore. All that shows up is a few BlackBerry apps but nothing like my spare Blackberry curve with BlackBerry world ?

Originally Posted by Bb girl 17

I av a Blackberry priv and cannot download Bb world from my plays tore. All that shows up is a few BlackBerry apps but nothing like my spare Blackberry curve with BlackBerry world ?

BlackBerry World is not available for the Priv. Even if you could somehow install it, none of the apps would be able to run on the Android OS used by the Priv.