vb.net background worker stops processing code on large file copy

Basically small files (under 500MB) all process perfectly, but large files such as 3-4GB movie files hang up the code so it never finishes...

basically it doesn't look like the BGW does anything after the bgw.reportprogress(0, filename) code. It should email and it should delete the original file, but it stops.

Does a BGW have a timeout or anything like that?

Can someone please take a look and tell me why it would only stop working on large files? It will mostly process one large file but stops directly after the bgw progress changed command.

Private Sub bgw_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles bgw.DoWork
        Dim FileName As String
        Dim HasMoreItems As Boolean
        Dim Mbpslower As String
        Mbpslower = "15Mbps"
        While True
            Files.MRE.Reset()
            HasMoreItems = False
            Do
                FileName = Nothing
                SyncLock Files.SharedObject
                    If Files.ToBeProcessed.Count > 0 Then
                        FileName = Files.ToBeProcessed.Peek
                    End If
                End SyncLock
                If Not IsNothing(FileName) Then
                    While IsFileInUse(FileName)
                        Debug.Print(DateTime.Now.ToString() & " : File in use!  Waiting 5 seconds...")
                        System.Threading.Thread.Sleep(5000) ' wait 5 seconds to try again
                    End While

                    Dim hiDef As String = "HD"
                    Dim FVOD1 As String = "FVOD"
                    Dim Fifteen As String = "15Mbps"

                    If FileName.ToLower.Contains(hiDef.ToLower) Or FileName.ToLower.Contains(FVOD1.ToLower) Or FileName.ToLower.Contains(Fifteen.ToLower) Or FileName.ToLower.Contains("ipvod".ToLower) Then

                        Good(FileName)

                    Else
                        Bad(FileName)

                    End If
                End If

                SyncLock Files.SharedObject
                    HasMoreItems = (Files.ToBeProcessed.Count > 0)
                End SyncLock
            Loop While HasMoreItems
            Files.MRE.WaitOne()
        End While
        'End If

    End Sub

    Private Sub Good(ByVal FileName As String)

        Dim Mbpslower As String
        Mbpslower = "15Mbps"

        Try

            If FileName.ToLower.Contains(Mbpslower.ToLower) Then
                bgw.ReportProgress(0, FileName)
                System.IO.File.Copy("C:\video\" & FileName, "X:\encoded2\mcvod\transcode_needed\" & FileName, True)

            Else

                System.IO.File.Copy("C:\video\" & FileName, "X:\CPS\" & FileName, True)

                System.IO.File.Copy("C:\video\" & FileName, "X:\Encoded2\" & FileName, True)

            End If

            SyncLock Files.SharedObject
                Files.ToBeProcessed.Dequeue()
            End SyncLock
            bgw.ReportProgress(0, FileName)

        Catch ex As Exception
            System.Threading.Thread.Sleep(5000) ' wait 5 seconds before trying again
        End Try

        If FileName.ToLower.Contains(Mbpslower.ToLower) Then
            GoTo finish
        Else
            GoTo email
        End If






email:
        'Email code removed, but this code works perfectly
        Dim objWriter As New System.IO.StreamWriter("C:\UploadLog.txt", True)
        objWriter.WriteLine(FileName)
        objWriter.Close()
        GoTo finish
finish:
        System.IO.File.Delete("C:\Video\" & FileName)
    End Sub

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Private Sub bgw_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles bgw.DoWork
        Dim FileName As String
        Dim HasMoreItems As Boolean
        Dim Mbpslower As String
        Mbpslower = "15Mbps"
        While True
            Files.MRE.Reset()
            HasMoreItems = False
            Do
                FileName = Nothing
                SyncLock Files.SharedObject
                    If Files.ToBeProcessed.Count > 0 Then
                        FileName = Files.ToBeProcessed.Peek
                    End If
                End SyncLock
                If Not IsNothing(FileName) Then
                    While IsFileInUse(FileName)
                        Debug.Print(DateTime.Now.ToString() & " : File in use!  Waiting 5 seconds...")
                        System.Threading.Thread.Sleep(5000) ' wait 5 seconds to try again
                    End While

                    Dim hiDef As String = "HD"
                    Dim FVOD1 As String = "FVOD"
                    Dim Fifteen As String = "15Mbps"

                    If FileName.ToLower.Contains(hiDef.ToLower) Or FileName.ToLower.Contains(FVOD1.ToLower) Or FileName.ToLower.Contains(Fifteen.ToLower) Or FileName.ToLower.Contains("ipvod".ToLower) Then

                        Good(FileName)

                    Else
                        Bad(FileName)

                    End If
                End If

                SyncLock Files.SharedObject
                    HasMoreItems = (Files.ToBeProcessed.Count > 0)
                End SyncLock
            Loop While HasMoreItems
            Files.MRE.WaitOne()
        End While
        'End If

    End Sub

    Private Sub Good(ByVal FileName As String)

        Dim Mbpslower As String
        Mbpslower = "15Mbps"

        Try

            If FileName.ToLower.Contains(Mbpslower.ToLower) Then
                bgw.ReportProgress(0, FileName)
                System.IO.File.Copy("C:\video\" & FileName, "X:\encoded2\mcvod\transcode_needed\" & FileName, True)

            Else

                System.IO.File.Copy("C:\video\" & FileName, "X:\CPS\" & FileName, True)

                System.IO.File.Copy("C:\video\" & FileName, "X:\Encoded2\" & FileName, True)

            End If

            SyncLock Files.SharedObject
                Files.ToBeProcessed.Dequeue()
            End SyncLock
            bgw.ReportProgress(0, FileName)

        Catch ex As Exception
            System.Threading.Thread.Sleep(5000) ' wait 5 seconds before trying again
        End Try

        If FileName.ToLower.Contains(Mbpslower.ToLower) Then
            GoTo finish
        Else
            GoTo email
        End If






email:
        'Email code removed, but this code works perfectly
        Dim objWriter As New System.IO.StreamWriter("C:\UploadLog.txt", True)
        objWriter.WriteLine(FileName)
        objWriter.Close()
        GoTo finish
finish:
        System.IO.File.Delete("C:\Video\" & FileName)
    End Sub

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