CSF firewall and iptables modules xt_connlimit

Hello,

Getting the following error when checking iptables modules for csf.

Please advise how I can correct this?

Thanks

[root@thor ~]# perl /usr/local/csf/bin/csftest.pl
Testing ip_tables/iptable_filter...OK
Testing ipt_LOG...OK
Testing ipt_multiport/xt_multiport...OK
Testing ipt_REJECT...OK
Testing ipt_state/xt_state...OK
Testing ipt_limit/xt_limit...OK
Testing ipt_recent...OK
Testing xt_connlimit...FAILED [Error: iptables: Protocol wrong type for socket.] - Required for CONNLIMIT feature
Testing ipt_owner/xt_owner...OK
Testing iptable_nat/ipt_REDIRECT...OK
Testing iptable_nat/ipt_DNAT...OK

RESULT: csf will function on this server but some features will not work due to some missing iptables modules [1]