multi track out for ez drummer

The easiest approach is to insert it with multiple outputs.
DO NOT insert EZ Drummer as a Simple Instrument Track. Insert with the following selections:
MIDI Source Track
All Synth Audio Outputs-Stereo(this gives you the eight outputs).
Synth Properties Page (this is the EZD GUI, and you will need to see it to set your drums to the individual outputs).
Once EZD has completed loading, click the OPEN MIXER button. 
Click on any of the Outputs, then click Multichannel. This will route the drum outputs to a default set.

You can also direct a given drum to a particular output using the mixer.
Be aware that this mimics mics on an acoustic set, and the drums are not totally isolated from each other, so you may see some bleed.
If you set it up right from the git-go, it's easy.
If you try to expand it out from the wrong insert selections, you have a bit of a battle on your hands.

I don't have EZD, but if it's like other soft synths, those are the synth output tracks. You don't record into them; you record into the MIDI track that is output to them.
Maybe RobertB will be along later to confirm.

There is another way, altho its very manually intensive; but I found I got excellent results and had better EQ control over the drums.

I dont use multi-track drums, I insert a single soft-synth that has the entire kit.

then I clone that EZ drummer output eight times, and in each one, go into the EZ Drummer kit picture and turn OFF every drum except one.

thus I have each drum on its own track, no bleed from the other drums.

It takes awhile to do, however, I have a template already set up to do it for new stuff.