Check if file exists on network path always returns false

Hello, Ive the following code in which I need to open a file if it is available. The file is at a network path (not mapped to a drive letter).

I cannot map to a network drive since this code runs as a service.

My problem is that even if the file exists, Im getting a FALSE result:

 Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
        Dim di2 As New IO.DirectoryInfo("\\192.168.10.11\c$\inetpub\mailroot\Badmail\")
        Dim diar2 As IO.FileInfo() = di.GetFiles("*.bad")
        Dim dra2 As IO.FileInfo
        BRANDFILE.Text = ""
        For Each dra2 In diar2
            Dim FILE_NAME As String = di2.FullName & dra2.Name
            If File.Exists(FILE_NAME) Then
                Dim objReader As New System.IO.StreamReader(FILE_NAME)
                Dim FileContent As String = objReader.ReadToEnd
                objReader.Close()
                objReader.Dispose()

                Dim data As String = FileContent
                Dim emailRegex As New Regex("\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*", RegexOptions.IgnoreCase)
                Dim emailMatches As MatchCollection = emailRegex.Matches(data)
                Dim sb As New StringBuilder()
                For Each emailMatch As Match In emailMatches
                    ListBox1.Items.Add(emailMatch.Value)
                Next

            End If
        Next
        Me.Cursor = System.Windows.Forms.Cursors.Arrow


Any suggestions that ARE NOT mapping to a network drive (letter)? Thanks.