[syslog-ng]Syslog-ng dies with logrotate

[Simeon Johnston]

We am using logrotate to rotate our logs and when I send syslog-ng the
HUP signal it dies.
We am using version 1.4.11.
Here is the config for logrotate.

/var/log/serv/VPN.log {
    postrotate
        kill -HUP `cat /var/run/syslog-ng.pid`
    endscript
}

This is the same rule we use for all the logs.  I thought the HUP signal
problem was fixed?
Should I try the newest 1.5.x version?
Would this command work better?
    killall -HUP syslog-ng

Thank you,
sim