Plugin – Not working?

Just installed the plugin and it’s absolutely having no effect. In the past hour dozens (if not hundreds or more) of ip’s have been attempting to login. Is there something that I’ve done wrong with my setup? Neither this, nor limit login attempts seem to be effective. Limit Login attempts used to work, but it stopped and no longer “sees” any new attempted logins. Which is why I came here, but am having the same problems. HELP!

http://wordpress.org/plugins/botnet-attack-blocker/