Ban when try to login

Hello.

After install and activate the plugin i am receive a ban then i try to login to back-end, here is the e-meil message i receive:

The Sun Nov 4 14:24:26 2012 has been detected an attack to your blog from the following remote computer :
IP Address : xxxxxx}
Username :
Rererer : http://xn--1001-t4dgt0q.xn--p1ai/wp-login.php
User-Agent : Mozilla/5.0 (X11; Linux) AppleWebKit/535.4 (KHTML, like Gecko) Chrome/18.0.1025.133 Safari/535.4 Midori/0.4

Attack details follow :

– Variable ‘redirect_to’ of the POST method triggered the filter ‘common comment types’ for the content ‘http://xn--1001-t4dgt0q.xn--p1ai/wp-admin/’.

So i removed the plugin, log in to the back-end, install it again and add variable ‘redirect_to’ to white list, log out and then i try to log in again it banned me. E-mail received:

The Sun Nov 4 14:35:21 2012 has been detected an attack to your blog from the following remote computer :
IP Address : xxx}
Username :
Rererer : http://xn--1001-t4dgt0q.xn--p1ai/wp-login.php
User-Agent : Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:16.0) Gecko/20100101 Firefox/16.0

Attack details follow :

– Variable ‘login && password’ of the POST method triggered the filter ‘wordpress login bruteforcing’ for the content ‘here was login and password’.

What should i do to prevent these false bans?

http://wordpress.org/extend/plugins/wp-sentinel/