HttpWebRequest Not Sending Cookie

Hi, so I have a program that's using HttpWebRequests and the user logs in, it stores the login on a cookie, but when i try to navigate somewhere on the site i have it log in on, it wont send the cookies. Here's some of my code:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim postReq As HttpWebRequest = DirectCast(WebRequest.Create("http://SITE/index.php?version=1.76&premium=true&udid=UNIQUEIDENTIFIER&pf=HASHEDIDENTIFIER&model=iPhone&sv=5.1.1"), HttpWebRequest)
        postReq.AllowAutoRedirect = False
        postReq.Method = "GET"
        postReq.Host = "SITE"
        postReq.KeepAlive = True
        'postReq.Referer = "http://SITE/index.php?"
        postReq.ContentType = "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"
        postReq.CookieContainer = theCookie
        postReq.UserAgent = userage
        Dim response As HttpWebResponse = DirectCast(postReq.GetResponse, HttpWebResponse)
        Dim reader As New StreamReader(response.GetResponseStream())
        Dim home As String = reader.ReadToEnd
        RichTextBox1.Text = home
        WebBrowser1.DocumentText = home
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Dim postReq As HttpWebRequest = DirectCast(WebRequest.Create("http://SITE/profile.php"), HttpWebRequest)
        Dim webHeaders As WebHeaderCollection = postReq.Headers
        webHeaders.Add("Accept-Language: en-us")
        webHeaders.Add("Accept-Encoding: gzip, deflate")
        webHeaders.Add("Cache-Control: max-age=0")
        webHeaders.Add("Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3")
        postReq.Referer = "http://SITE/home.php"
        postReq.CookieContainer = theCookie
        postReq.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
        postReq.Host = "SITE"
        postReq.KeepAlive = False
        postReq.UserAgent = userage
        postReq.AllowAutoRedirect = False
        Dim response As HttpWebResponse = DirectCast(postReq.GetResponse, HttpWebResponse)
        Dim reader As New StreamReader(response.GetResponseStream())
        Dim home As String = reader.ReadToEnd
        RichTextBox1.Text = home
        WebBrowser1.DocumentText = home
    End Sub

obviously where it says "SITE", it's really the site url. And the uniqueid and hashidentifier i didn't really want to post public />

So the button2 webrequest seems to work fine and it stores the cookie to a global variable, the issue comes with button3. When i click button3, it seems to post through fine, but the cookie isn't sent so i get the websites response of not having a cookie included. I know the cookie isn't posted also because when i traced my program with fiddler i got this in the cookie section: "This request did not send any cookie data." However when i actually do it from a browser where the browser stores the cookie i get this: "Request sent 348 bytes of Cookie data:

asc=CookieDataHere". It also appears that the cookie doesn't appear in the header when i do it. Any and all help is greatly appreciated. Thanks in advance.