Jennifer and Bill : I had the exact problems you got. After following you and Bill's discussions and instructioins, I overcame the similar errors you got. However, my final result of running http://localhost/sampleapp/multipage.aspx is as following diplay: This is page number one This is page number two. and this page view is selected! Is this what I supported to be obtained ? What is your final result ? I expect to see the UI of MultiPage. Thanks for your advanced help. Joseph Qiu