The rule should look like this:
ip access-list extended POS-inboundfilter\r
remark POS-inboundfilter Version 20140214\r
evaluate POS2-traffic\r
remark Allow ICMP (ping)\r
permit icmp any any reflect POS-traffic\r\n
Of note, when you hit the return button in the rule you are adding a \n
NCM stores the configs with a \r\n