I want to use the Interval Role in Darwin streaming server,more specifically i want to call the QTSS_SetIntervalRoleTimer() when the server starts streaming a video file.But i have problem in doing this as from what it seems,the method returns QTSS_Err when i do that. I believe that the problem is due to the fact that the callback is made in a a module-created thread. Is there a specific place where this callback must be done?(if i put the callback in the register role of my module it works,but i dont want this,because i dont want the timer starting when the server starts).Any help will be useful,thank u in advance.