Hi.. did you declare on the Schedule 1 that you had refused the visa once? there is a question that have you been rejected any visa before if your answer was no. then you need to send an explanation letter that you forget to answer yes. and explain what happened.add a copy of the refusal letter as well. and a copy of the new visa.hard Send hard copies. after two week send an email to conform the delivery of the additional documents.if you think you miss any other documents send everything together.once they conform that they received all document, then you are safe.
Good luck
Good luck