Which brand SD card did you use? Also, which kind of batteries?
Reason I ask is I spent a couple hours at Cabelas buying a game camera and the section manager and his best game cam guy shared their experiences with customers bringing back game cameras. They said the 2 biggest issues were brand of SD cards (they recommend Sandisk and, of course, Cabelas) and type of batteries (Lithium batteries give you full power until they die whereas alkaline batteries apparently decrease their power output as their juice runs lower).