form validation callbacks aren't being called

[eluser]niurexx[/eluser]
[quote author="flaky" date="1264528816"]you should extend Form validation

Code:

class MY_Form_validation extends CI_Form_validation{
    
    function run($module = '', $group = ''){
        (is_object($module)) AND $this->CI = &$module;
            return parent::run($group);
    }
    
}

and when using form validation insert $this into run()

Code:

if($this->form_validation->run($this))
.
.
.

[/quote]

i've tried to use your suggestion but my form still not working.. is there any server or php level requirement to run this hmvc ?

my php version is : PHP Version 5.2.13
mysql version is : MySQL client version: 4.1.22

i've tried to install fresh ci and insert simple callback vallidation but it seems not working..