yii user management problem????

Hi guys i m new to yii i have yii1.1.6,morzilla6.0,php5.0

i followed process given in http://www.yiiframework.com/wiki/68/installing-and-configuring-the-yii-user-management-module-under-a-fresh-skeleton-application-generated-by-yiic/

i m getting following error

CWebUser does not have a method named "isAdmin".

[color=#222222][font=Arial, sans-serif][size=4]D:\xampp\htdocs\NewProject\yii-1.1.2.r2086p\yii-1.1.2.r2086\framework\base\CComponent.php(237) …"[/size][/font][/color]

[color=#222222][font=Arial, sans-serif][size=4]

[/size][/font][/color]

[color=#222222][font=Arial, sans-serif][size=4]plz help me ASAP…[/size][/font][/color]

[color=#222222][font=Arial, sans-serif][size=4]Thanx,[/size][/font][/color]

I’m having the same problem - and I’m seeing a lot of people asking about this, but getting no replies - is this module being developed any more?

Anyone know of a good replacement?