Ok, I've talked to Luna, put the bench by the vine/tree thing and climbed up on the roof. But I can't seem to repair the roof. I tried Repara and kept my mouse moving like all the other times and the roof will start to repair, but then it stops. Then I hear Ron saying "Need some help?", but then none of the others (Ron, Luna or Hermione) help with the repairing of the roof. Am I missing something?