PHP ActiveRecord动态查找器不起作用

I've installed codeigniter with sparks, along with php-activerecord spark as instructed on getsparks.org

I've made model Item for Items data table

<?php 

Class Item extends ActiveRecord\Model {

}

and when I use

Item::all(array('conditions' => array('status = 0'))) 

everything goes fine, I'm getting all the items with status 0 via view (CI) (or via var_dump ).

By Using

Item::table()->last_sql; 

gives me

SELECT * FROM `items` WHERE status = 0

but when I use

Item::find_by_status(0); 

Item::table()->last_sql; 

gives me

SELECT * FROM `items` WHERE `status`=? LIMIT 0,1

And I'm getting and error "Trying to get property of non-object"

Additional info:

table has this fiels:

id (int 11) primary key
name (varchar 15)
status (tiny int 1)

I'm using PHP version is 5.3.1

This solves the problem:

using find_all_by_statys(0) instead of find_by_statys(0) because it returns many results instead of only one.