OK then, fair enough. And no offense intended, but it's not clear to me why you're having so much trouble with this. So in the interest of getting you going, let me ask you a few questions...
1) why channel 2?
2) is local turned on or off in your keyboard?
3) why would you need to convert audio recordings into MIDI after-the-fact when you have the facility to record MIDI, perfect the part, and then record as audio later on?
Since the sound isn't coming from Logic, there isn't much reason to use an external instrument. My suggestion would be to create a normal MIDI instrument in the Environment (forget about using AMS -- it's more trouble than it's worth sometimes). Assign that instrument to the port to which your keyboard is connected, give it a name ("PS200") and then assign that instrument to a track. This is a MIDI-only track on which you'd record and perfect your part.
Then you'd create an audio track. Connect the audio outs of your keyboard to the input of your Mac (via built-in audio or your interface, whichever you're using) and then select those inputs on that audio channel. Put it in record and record the audio of your piece all the way down. Now you have the best of both worlds: an original MIDI track, and, the audio recording of same.
BTW, when creating a MIDI instrument in the manner I described, you'd probably want to save that project as a template and recall it every time you want to start a new song. Otherwise you'll have to re-create that MIDI instrument each time you create a new project.