Fields not hidden into login_block

Spamicide works fine on comments, fields are hiddens. But not with login block, where fields are still visible.

Here is the code:

<div class="edit-user-login-block-wrapper">
<div id="edit-user-login-block-1-wrapper" class="form-item">
<input id="edit-user-login-block-1" class="form-text" type="text" value="" size="20" name="user_login_block" maxlength="128">
<div class="description">To prevent automated spam submissions leave this field empty.</div>
</div>
</div>