Don't give up on it. I did the same thing and had similar problems as you and put it away for over a year and never touched it. Then I watched the inventors videos, and pointed my wrist up more and walla. Now, I would say it is my best friend. Also, like someone already mentioned to you, it must be on a flat service. If it isn't, it will skip.
Thousands of people can't be wrong when they say how much they love theirs (including me) so take some to time to figure out what your doing wrong.