jflow not working on reth interface

Any idea on this?  I cannot get this darn thing to work on reth interface - works fine on our non HA srx's 

JUNOS 12.1X46-D35

/* Lan LB */
    reth2 {
        redundant-ether-options {
            redundancy-group 1;
        }
        unit 0 {
            family inet {
				sampling {
                    input;
                    output;
                }
				/* seemed to stop dhcp from working */
				address xxx
            }
        }
    }

services {
    flow-monitoring {
        version9 {
            template ipv4-test {
                ipv4-template;
            }
        }
    }
}

forwarding-options {
    sampling {
        input {
            rate 100;
            run-length 0;
        }
        family inet {
            output {
                flow-server 192.168.21.27 {
                    port 9997;
                    version9 {
                        template {
                            ipv4-test;
                        }
                    }
                }
                inline-jflow {
                    source-address 0.0.0.0;
                }
            }
        }
    }
}