Plugins doesn't work

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Hello, i've installed these 2 plugins:
blockspamsending
limit_recipients
but it doesn't work. If i send 5 times the same email it doen't block me. And if I set over than 10 recipients it doesn't block me.

This is how I installed plugins.
1)I've downloaded roundcube-0.6-bundle-v2.2.zip . Extract and copy 3 dirs (blockspamsending,limit_recipients) into plugins/ od roundcube
2)I've copied config.inc.php.dist to config.inc.php and edit it setting  $rcmail_config['body_tolerance'] = 2;
3)I've edited limit_recipients/config/config.inc.php  setting:   $rcmail_config['limit_recipients'] = 5;
4)Ive changed in config/main.inc.php  
 $rcmail_config['plugins'] = array(
        "blockspamsending",
        "limit_recipients"
        );

But it seems doesn't work.
What's wrong in my config?

Thanks in advance.