Excellent. Got power.
I'd go to the software page on the wiki and download the "SS Color Finder" program.
It gives you three sliders and sends out the whole pixelnet universe as rgbrgbrgb... It avoids the added complexity of setting up vixen, LSP, or some other program and touches all addresses...
If I had to guess, my next area of concern is the actual connection to the pixels, there are 11 wrong ways to hook them up...
I'm assuming that you are using pixels as the other nodes have their inputs marked. Make sure you are using the wires that go into the pixel on the side that the big black chip is on. The back side has several smaller resistors. This eliminates 6 wrong ways...
Red wire is +12v, but you knew that...
Blue and green... Green should be ground and blue data, but if the first pixel glows a faint blue, try swapping them.
Run the SS address utility, set up your nodes, use the drop-down to select the number of nodes, hit transmit, and do the jumper thing. Pixels should start blinking white, unplug the ssc and plug it back in (reset). Close/exit the SS address utility, then start the color finder.
In an early version of the ss address utility, manually typing the number of nodes did not work. I think this was fixed, but it's always safer to use the drop down. Also, be careful about addresses near the end of a universe. If the start address + (#nodes times 3) is greater than 4096, the ssc will have issues.