my blackberry works perfectly fine, but today my bbm was acting weird. i would send someone a message and it wouldn't get delivered & they never got it. i also did not get any of there messages for hours. then finally i bbmed someone else to see if it's working and it finally worked. and i finally got the all the messages that i didn't before. & now it's back to normal, but why does that happen? & if it happens again how can i fix it or prevent it?