Mr Happy, I will have to let someone else try to help you.
I only have EZD on my Surface, so I can't see how to point you in the right direction.
But with EZD the options for midi out (vst2 drop down menu in plugin) on my setup is checked and not greyed out like yours is. However, my midi in is greyed out like yours.
The place where I was telling you to look is in Views/Synth Rack. At the top of the Synth Rack there are four Icons starting on the left. The fourth one should be "Insert SoftSynth Properties." This is where I was trying to get you to go to look for "Enable Midi Out." But I found out on my EZD that option is not there. So maybe for EZK it's aslo not there like I thought it was. Sorry.
[Edit] As I was posting this (and doing other things, at work right now: ) I see that Steve got you going. Great! Glad you got it sorted out.