Thank you Princy
I created a new project and used your code in it
It worked & Thanks alot , But i don't know why it doesn't work in my project.
I even set the PageViewID , (PageViewID=RadMultiPage1)
Here is the full code of my project :
Default.aspx code :
Default.aspx.cs code :
Tell me if you realized my code problem!
Thank you again! :)
Hassan