I have to say that i haven't used data-role a lot.Having said that i don't really think that response.Redirect gives squat about your intention. Since it's a server side function it will redirect at page level, meaning it will not even try to parse any client html div's.
Now to be clear, are you saying you expect it to redirect to a specific page or a specific SECTION of a page?
For the later you may be better of by using Javascript. I think there are a lot of examples in the internet showing how to scroll to a specific div with a specific id.