BGP update schedule problem

Hello all, I don't know if anyone can help me but this is my problem: I want to trigger an UPDATE message in some situations, so I inserted a: bgp_schedule_packet(pr->conn, ch, PKT_UPDATE); In the point that I want to schedule it, pr->conn and ch refer to the correct connection and channel where I want to send the UPDATE. My question is now how can I trigger the sending of the UPDATE? because looking in the logs I correctly schedule the UPDATE but it isn't sent after a while. Thanks, Mattia