Problem with Telerik RadDatepicker DatePoup in Ajax Model Poup and Jquery Dialogor

Hi All 

I am using Telerik RadDatepicker DatePoup in Ajax ModelPoup.

I am having issue like i just click on the datepicker the Datepoup is opened  and i Scrolled the window with mouse, this time the  Datepoup is moved away from the Control.

Can any one help me on this.

please find the attachment   for reference .

help me plz.......