Alias "bootstrap.widgets.bootactiveform" Is Invalid.

[font="Verdana"][size="2"]Alias "bootstrap.widgets.BootActiveForm" is invalid. Make sure it points to an existing directory or file.[/size][/font]

[font="Verdana"][size="2"]im getting this error. im doing a project in uploading and displaying image from link " [/size][/font]http://www.yiiframew…-stored-images/ "

im getting this error in part in "_form " created by crud after code




 	$form = $this->beginWidget('bootstrap.widgets.BootActiveForm', array(

    'id'=>'image-form',

    'enableAjaxValidation'=>false,

    'method'=>'post',

 			'type'=>'horizontal',

    'htmlOptions'=>array(

        'enctype'=>'multipart/form-data'

    )

 	));

      

[size=2]check in extension/bootstrap/widgets folder is BootActiveForm.php exist?[/size]

[size=2]no its not present extension folder is empty[/size]

thanks i solved it by looking in these two links . http://stackoverflow.com/questions/12563852/how-to-add-downloaded-extension-to-yii

http://stackoverflow.com/questions/11866179/twitter-bootstrap-in-yii