I just purchased a Tascam Portastudio DP-02CF (refurbished) and I am having some trouble, I am getting no playback. I assume its recording because I hear it through my headphones and the meters show it is getting a signal, but when I go back and press play I get no sound at all. I did some internet research and it seems to be a somewhat common problem, so is there a solution? Or am i doing something wrong?? Help!