[syslog-ng]Syslog-ng and Linux iptables

Hello, I am having problems getting syslog-ng to work with the iptables logging facility under linux. The iptables rules allow logging and it works fine with the standard klogd/syslogd loggers with RedHat 7.1. I believe that the default kernel messeges use kern.warn as the facility.priority. When I replace syslogd with syslog-ng (and keep using the default klogd) I no longer receive any of the kernel messages. I have tried both of the following filter lines filter f_warn { level(warn); }; and filter f_kern { facility(kern); }; I can get all of the other looging to work, I am only having problems with the kernel messages? Has anyone else had this problem? Thanks Ken