C# / VB.NET - Gestire OutOfMemoryException

Aiuto sto impazzendo !

Ho creato un semplice form di accesso ma quando lo eseguo mi da un errore di memoria insufficiente !


QUESTO IL REPORT:

System.OutOfMemoryException non è stata gestita
  Message="Memoria insufficiente."
  Source="System.Drawing"
  StackTrace:
       in System.Drawing.Graphics.FromHdcInternal(IntPtr hdc)
       in System.Windows.Forms.PaintEventArgs.get_Graphics()
       in System.Windows.Forms.Control.PaintBackColor(PaintEventArgs e, Rectangle rectangle, Color backColor)
       in System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)
       in System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)
       in System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)
       in System.Windows.Forms.ScrollableControl.OnPaintBackground(PaintEventArgs e)
       in System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
       in System.Windows.Forms.Control.WmEraseBkgnd(Message& m)
       in System.Windows.Forms.Control.WndProc(Message& m)
       in System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       in System.Windows.Forms.ContainerControl.WndProc(Message& m)
       in System.Windows.Forms.Form.WndProc(Message& m)
       in System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       in System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       in System.Windows.Forms.UnsafeNativeMethods.PeekMessage(MSG& msg, HandleRef hwnd, Int32 msgMin, Int32 msgMax, Int32 remove)
       in System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
       in System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       in System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       in System.Windows.Forms.Application.Run(ApplicationContext context)
       in Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
       in Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
       in Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
       in GFS_Communication_Generale.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:riga 81
       in System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       in System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       in Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       in System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       in System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

questo e' il codice del form molto molto semplice ma va ad aprire altri form leggermente più complessi...

come risolvo ?
oppure se dovrei liberare memoria al caricamento ?

 Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click

        'Se è un agente
        If txtUser.Text = "agente" And txtPass.Text = "agente" Then
            Me.Hide()
            frmAgenti.ShowDialog()
            Me.Close()

            'Se è un addetto al call center
        ElseIf txtUser.Text = "callcenter" And txtPass.Text = "callcenter" Then
            Me.Hide()
            frmTelemarketing.ShowDialog()
            Me.Close()

            ' Se è l'amministratore
        ElseIf txtUser.Text = "admin" And txtPass.Text = "admin" Then
            Me.Hide()
            frmAdmin.ShowDialog()
            Me.Close()

        Else
            'Login errato
            MsgBox("Attenzione Username o Password Errati !", MsgBoxStyle.Exclamation)
            Exit Sub
        End If
    End Sub

    Private Sub Cancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Cancel.Click
        Me.Close()
    End Sub

Manca il resto del codice. Usi immagini particolarmente pesanti, magari su un dispositivo mobile?

Grazie come al solito Totem, comunque ho risolto riavviando il mio pc, anche se le immagini sono leggere ed il mio pc è molto molto potente, quindi in ogni caso non ho capito a cosa e dovuto...