First see if the 3.6V batteries work with it just to be sure it's not an input problem. You can always find some sort of battery solution, but it's best to rule it out.
I picked up some RCR123A Ultra Fire 3.7V 880mah Protected batteries. They did the trick!!! It's looking good now! I had to quickly set the pot because the diodes got extremely hot quick but she's good to go now.