I started smoking just today with this smoker and couldn't get temp to go above 122 degrees. Was doing 2 boneless chicken breasts. 3 hrs and had to finish them on the grill. Why inset it going higher on the temp. It is a 6 rack digital. Everything is hooked up correctly. Seasoned it for the first time yesterday per directions and did 150 degrees no problem. Any help would be appreciated.