Is Rockit communicating with the controller...?
On the Config->Control options, make sure you have
Use Controller checked, choose the 2500 mapper, or the Numark Total Control just to get started, and then click the Save button. Rockit has to be restarted with the controller attached and turned on.
Once restarted, go back to Config->Control, and click the MIDI Learn button. It will give you the MIDI status, and what devices it can see.
Depending on your version of Windows, you may need to change the MIDI input device to 1, instead of 0 (zero) -- Vista and above usually require a 1 (one), since they tend to use the default zero channel for other things in Windows.
Once you have the controller communicating, we can go from there.
@Jacob -- It was page 20, not 27...