[syslog-ng]Power fail restart

I am running version 1.5.13. All but 2 of 60 remote devices FAILED to reconnect when the power returned in Ontario. The cental logging host did not go off-line, as it was on emergency power. I use the standard /etc/init.d/syslog-ng start scripts for the remote devices. They are all Linux machines. After issuing HUP to the central host, 9 of 60 connections are working. Running "snoop" shows that the remote daemons have stopped trying to connect. I thought that syslog-ng was supposed to reconnect after such events? Can anyone tell me what I can do to make these remote devices reconnect? Must I manually restart syslog-ng on each remote client? Thanks in advance...