i've been using the FB app since last year November... and all of sudden I can't access them anymore....

I'm opened an account with my service provier to have BIS...

I think I have to go to their tech support this week again, cause the last i was there had to fix the settings (?) of my bb messenger

I ask him if I can be able to download the app world.. and he said yes,... so I think I have to ask him to do it for me....

Thanks for the help.

Call your cell phone company to make sure that they have the Blackberry service on your account.  I had the same problem earlier today and T-Mobile added that service to my account and I was able to download the App World. 

Only thing I can think of is you're in a country that doesn't get app world yet...

But if not..use your phone browser and go to

http://www.blackberry.com/appworld

What do you mean you are downloading it from your computer? I would suggest going to the website on your BB browser and from there it may help with the process! Also I would suggest doing a battery pull if you still have this issue, and then try and redownload it!