New Post: Parameter is not valid.

I am currently using Ghostscript.net to process pdf's into images. For multipage document the first page processes then the next throws the error: "Parameter is not valid." Here is the stack trace:

at System.Drawing.Bitmap.LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format, BitmapData bitmapData)
at System.Drawing.Bitmap.LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format)
at Ghostscript.NET.Viewer.GhostscriptViewerImage.Lock()
at Ghostscript.NET.Viewer.GhostscriptViewerDisplayHandler.Page(IntPtr handle, IntPtr device, Int32 copies, Int32 flush)
at Ghostscript.NET.GhostscriptDisplayDeviceHandler.display_page(IntPtr handle, IntPtr device, Int32 copies, Int32 flush)

And here is the code:

Dim TestGWScriptRast As New Ghostscript.NET.Rasterizer.GhostscriptRasterizer
Dim GSLatestVer As Ghostscript.NET.GhostscriptVersionInfo =   Ghostscript.NET.GhostscriptVersionInfo.GetLastInstalledVersion()
        Try
            Dim OutPutDir As String = My.Computer.FileSystem.SpecialDirectories.Temp
            TestGWScriptRast.Open(PDFPath, GSLatestVer, True)
            For PageToProc As Integer = 1 To TestGWScriptRast.PageCount
                If TestGWScriptRast Is Nothing Then
                    TestGWScriptRast = New Ghostscript.NET.Rasterizer.GhostscriptRasterizer
                End If

                Dim TempPngImagePath As String = OutPutDir & "\temppng" & Identifier & PageToProc & ".png"
                Dim PDFImage As Image = TestGWScriptRast.GetPage(96, 96, PageToProc)
                Dim PDFImageClone As New Bitmap(PDFImage.Width, PDFImage.Height)
                Dim PDFGraphics As Graphics = Graphics.FromImage(PDFImageClone)

                PDFGraphics.DrawImage(PDFImage, 0, 0)
                PDFImage.Dispose()

                PDFImageClone.Save(TempPngImagePath, Imaging.ImageFormat.Png)
                PDFImageClone.Dispose()
                GC.Collect()

            Next

Is there a workaround or another possible solution to this issue? Any help is greatly appreciated.