Thank you all the tip! I appreciate it. We worked on the wall paper today, the entire afternoon, followed the advises, with detergent and warm water, we basically learned that the wall paper would not absorb the water unless we peel the top coat off (vinyl) then reapply water, waited few seconds, and voila, paper off. Please let everyone know not to buy the wall paper remover solution they sell at home depot, did not work. Don't buy the scraper either, we used a kitchen knife to help peel the coat off, then to get the bottom coat off when it was ready to come off.
Thank you all!