Bad host detection, nth error

Hello all, I was performing the steps enumerated here
http://wiki.mikrotik.com/wiki/Bad-host-detection
but unfortunately i encountered an error at
add action=add-src-to-address-list address-list=24-hour-list address-list-timeout=“1d 00:00:00” chain=bad-host-detection comment=“If seen 20 time in 30 seconds add to the one day block list” disabled=no nth=20,0 src-address-list=30-seond-list
the error stated something like that the nth was not a valid number and had to be >= 0
considering this is straight from the Mikrotik wiki i was surprised that i would get an error? I changed the 0 to a 1 and the command went through, however when completing all the steps of the tutorial and implementing them, all of the network traffic flowing through the firewall was dropped,

any ideas?

thanks

this article was not created by mikrotik, and is not verified. official documents have CATEGORY:MANUAL in the http link:

http://wiki.mikrotik.com/wiki/Category:Manual#list