Autonomous with Mecanum holonomic drive

I’m trying to set up the Autonomous Independent VI to work with a Mecanum-driven robot. As first I thought it would be as easy as replacing the Arcade Drive VI in the default Autonomous Independent VI with one of the Holonomic Drive VIs and setting the rotation to zero, but when I deploy the code (built and everything) and run an Autonomous period only two of the four drive Jaguars spin up and show activity on the LEDs. Am I forgetting something?

On second thought, I just found http://www.chiefdelphi.com/forums/showthread.php?t=89411 and it came to my attention that Tank Drive would be a feasible alternative.

We are using a Mecanum drive this year also, and we decided to treat auton as if we had just a basic tank drive system. Easier to deal with.