hi to every one!!

I am geting an error while working on telerik control ...

Cannot implicitly convert type 'Telerik.Web.UI.RadTab' to 'Telerik.Web.UI.Skins.RadTabStrip'

on this line
RadTabStrip currentTab = this.RadTabStrip1.FindTabByUrl(Request.Url.PathAndQuery);

can any one put certain guidance on this..