Samsung PMA wireless charger won't charge S6?

I got this charging pad (http://www.att.com/chargers/samsung-...rging-pad.html) with my S6 when I bought it. However, it has not worked at all. Whenever I put my phone on it, the blue light just starts blinking; the charger doesn't charge the phone. I have tried different outlets with different wall adapters and different microUSB cables, but nothing works. However, the S6 works fine with my Duracell PowerMat and my Qi charger. Is anyone else having this issue with the PMA (or Qi) OEM Samsung wireless charger? Any tips? Thanks in advance.