RadTabStrip +RadMultipage javascript error

[Harshal]

Hi,
I am using RadTabStrip + RadMultiPage and it i am using Telerik 2008.2.826.20 version.
I coverted the classic RadTabStrip.Net2 to Telerik 2008.2.826.20. After that it started throwing javascript error "Children" is null or not an object.
The error occures in Telerik.Web.UI.WebResource.axd. (var _bd=_ba.children||_ba.childNodes;) where _ba is null.

Any help is appreciated.

Thanks,
Harshal.