Models in PHP4

[eluser]nirbhab[/eluser]
Hello all,
My code:

Code:

<?php echo $this->SiteModules->SiteModules_var;?>
<!--this code in views-->

A PHP Error was encountered

Severity: Notice

Message: Undefined property: SiteModules

Filename: views/template.php

Line Number: 2

controller constructor:

Code:

function Welcome()
    {
        parent::Controller();
        $this->load->model('SiteModules','SiteModules',true);    
    }

OS: Windows