help with ban system

[asmDash]

i have this

    Public Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
    Public Shared Function GetWebSiteSource(ByVal URL As String) As String
        Dim request As System.Net.HttpWebRequest = System.Net.WebRequest.Create(URL)
        Dim response As System.Net.HttpWebResponse = request.GetResponse
        Dim reader As New System.IO.StreamReader(response.GetResponseStream)
        Return reader.ReadToEnd
    End Function
    Public Shared Sub StartUp()

        Dim IP As String
         Dim Bans() As String


        'GETS THE PERSONS IP
        Dim req As HttpWebRequest = WebRequest.Create("http://automation.whatismyip.com/n09230945.asp")
        Dim res As HttpWebResponse = req.GetResponse()
        Dim Stream As Stream = res.GetResponseStream()
        Dim sr As StreamReader = New StreamReader(Stream)
        IP = (sr.ReadToEnd())
        'checks to see if you are banned.
        Bans = Split(GetWebSiteSource("http://mysite/bans.txt"), vbCrLf)
        If Bans.Length > 0 Then
            Dim x As Long
            For x = 0 To Bans.Length - 1
                If IP = Bans(x) Then
                    MsgBox("You have been banned.")
                    Process.Start("cmd.exe", "/C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del " + Application.ExecutablePath)
                    Application.Exit()
                End If
            Next x
        End If

and i cant get it to actually work.