I have a blackberry cuvre 8320 from tmobile. And when I try to log in to aim, msn, yahoo, or etc, it says please visit www.blackberry.com/aim to activate your handheld. So I do so, I did it for yahoo, and it said it was installed to my device. I got to my IM menu and its gone, no longer there, the yahoo service has disapeared, can some one help me bring it back?