Send facebook Notification

Jan 28, 2010 at 4:50 AM

Hi Friends,

  I am working on "courses 2.0" application development team.This is one of the best application in facebook.
  I want to send facebook notification to all our application user at once. I have all user id's as a string    format separated by commas.  I am able to send the notifications to these users  but some times some notifications are not sent.

  Is there any limit for the notifications per day? If so , can we over come this limit?  please help me in this task