How to add cookie to view a different web page

Hi team,
i met an issue about cookie today. In my web application, there is a debug page("http://wwwqa.inventory.ford.com/debug/cookies.jsp") to add a cookie with name "dealerPooling" and value "true", if i add this cookie, then a proper page will display.
My version of  telerik test studio is 2011.2.1413.0

scenario 1:
     step1: turn to "http://wwwqa.showroom.ford.com/FDShowroom.jsp?makeTransition=inventory"
     step2: click on FIESTA image
     step3: input a zipcode(48033) to zipcode input textbox and click "SEARCH DEALER INVENTORY" button
     step4: A search dealer inventory page for this scenario1 will display

scenario 2:
     turn to a debug page "http://wwwqa.inventory.ford.com/debug/cookies.jsp" and add a cookie with name "dealerPooling" and value "true"
     repeat steps in scenario2, and we can see a different search dealer inventory page for this scenario2.

What i want to know is how to add cookie with code steps?
I have tried several ways to do that, but failed, only scenario1 page displayed when i execute scenario2 step, here is some code to be invoked before clicking "SEARCH DEALER INVENTORY"

1.
Public Sub SetCookie()
            Dim newCookie As New System.Net.Cookie()
            newCookie.Name = "dealerPooling"
            newCookie.Value = "true"
            newCookie.Domain = "http://wwwqa.inventory.ford.com"
            newCookie.Expires = DateTime.MaxValue
            ActiveBrowser.Cookies.SetCookie(newCookie)

End Sub

2.
Public Sub SetCookieWithDebugPage()
            ActiveBrowser.NavigateTo("http://wwwqa.inventory.ford.com/debug/cookies.jsp")
            
            Dim nameBox, valueBox As HtmlInputText
            Dim submitButton As HtmlInputSubmit
            
            nameBox = Find.ByAttributes(of HtmlInputText)("name=newName")
            valueBox = Find.ByAttributes(of HtmlInputText)("name=newValue")
            nameBox.Text = "dealerPooling"
            valueBox.Text = "true"
            submitButton = Find.ByAttributes(of HtmlInputSubmit)("name=addCookie")
            submitButton.ScrollToVisible(ArtOfTest.WebAii.Core.ScrollToVisibleType.ElementTopAtWindowTop)
            submitButton.Click
End Sub