Okay, I'm not a brewboard expert, but I've set up enough DIYinos to be familiar with them.
For starters, could you share some pictures of your brewboard setup? Helps to diagnose the problem if we can see what's the matter with it.
Step two, the obvious in hindsight, but often overlooked, problems:
-Is your battery fully charged? or, if you're using a power supply to test it, are you giving it enough power? Neopixels are power hungry (60mA per pixel, times your total number of pixels is a lot of power)
-Have you uploaded STREAM to the Arduino?
-Have you checked the arduino beforehand to see if it actually works? The cheapo ones from the internet can be completely bricked before you ever get them, so just run any of the basic sketches (Blink, fade, etc) in the arduino IDE to test it out.