Indonesia said it was confident of reaching a draft peace agreement with rebels in tsunami-ravaged Aceh province in talks due to start Tuesday in the Finnish capital. "Hopefully this round can solve all the problems and hopefully by August we can sign the final (deal)," senior negotiator Sofyan Djalil told reporters as he arrived in Helsinki on Monday. "I am very optimistic." But the chief mediator of the talks, former Finnish President Martti Ahtisaari, sounded a more cautious note. "The parties agreed to let (the mediators) work on the drafts of the agreements, which we submitted two weeks ago," he told The Associated Press in an interview. "We have heard nothing from either side since then."