Your ParseExact format is wrong:
Dim Time As DateTime = DateTime.ParseExact(Value, "dd-MMM-yyyy", CultureInfo.InvariantCulture)
Expects the date as "25-Jan-2012"
You want
Dim Time As DateTime = DateTime.ParseExact(Value, "dd/MM/yyyy", CultureInfo.InvariantCulture)
Which expects "25/01/2012"