[Resolvido] App de PrintScreen

Galera...estou fazendo um app que tira print da tela do usuario e grava no pc...ate ai td bem,

Testei no ctrl + F5 e saiu direitinho, porem

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Nao consigo compilar o executavel

Erro: an error has occured while signing: SignTool.exe not found

Segue o APP

Public Class PegaTela

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
PrintaTela()
End Sub

Public Shared Function GetWindowCapture() As Image
SendKeys.SendWait("^{PRTSC}")
Dim objClipboard As IDataObject = Clipboard.GetDataObject()
Return objClipboard.GetData(DataFormats.Bitmap)
End Function

Public Shared Sub PrintaTela()
'If Date.Now.Hour < 8 And Date.Now.Hour > 18 Then Exit Sub
Dim aData As Array = Split(Date.Now, " ")
Dim aNome As Array = Split(aData(0), "/")
Dim vNome As String = ("c:\windows\System_PRTSC-" & aNome(0).ToString & aNome(1).ToString & aNome(2).ToString & "-" & Replace(aData(1).ToString, ":", "") & ".bmp").ToString
GetWindowCapture().Save(vNome.ToString)
'tira print de 15 em 15 minutos
System.Threading.Thread.Sleep(900000)
PrintaTela()
End Sub
End ClassAlguem tem ideia o pq nao publica?

Mto obrigado galera!