Audio interface connection issues - growing very frustrated!

Hi there,
I'm having a **** of a time with a very basic recording set-up. I'm using an M-Audio Fast Track with Logic Pro 9. I have a digital stage piano which is connected via USB to my macbook pro, but I am also connecting one of the audio output ports from my piano (a Kawai MP5) into the audio interface device. Basically I want to take advantage of the software instruments, AND some of the built-in piano sounds of my digital piano. My set-up is like this: the audio interface device is connected via USB to my macbook pro. My piano is also connected via USB to the macbook pro. My piano has another connection going into the audio interface device. I want to be able to hear ALL audio via the headphone output on the macbook pro. I have the audio settings within Logic Pro set up such that the audio input device is the Fast Track, and the audio output device is the built-in output of the macbook.
Within Logic Pro, I create a real instrument track, and I have it record enabled, BUT - I cannot hear anything coming through. The signal indicator on the Fast Track lights up whenever I play the piano...but I do not hear anything in my headphones (connected to the macbook's built-in output). If I create a software instrument track, I have no problem hearing anything.
Would somebody please PLEASE tell me how to connect my devices or adjust settings so that I can hear my piano within Logic Pro? Technically, the way I have connected everything should work from the way I see it. I don't know if I have to have a monitor enabled or disabled somewhere in order to hear the piano, but I have been playing around for over an hour now trying to get sound to come through with no success.
Thanks.

There are Audio track types Mono (one meter) Stereo (two smaller parallel meters) They can be changed using the small circle(s) at the bottom of the channel strip under the meter. It's self explanatory once you click on the circle.
The Inputs reflect your audio Interface. I assume Input 1 is your Mic Input, Input 2 is your guitar input... If you use a stereo track you will probably see Input 1-2 which means both inputs are being monitored... If your guitar is plugged into Input 2 you will only hear one side.
My audio interface has 8 inputs so I if I'm choosing inputs for a stereo strip I see pairs.. 1-2, 3-4, 5-6, 7-8. If I choose inputs for a mono track I see 8 individual inputs. If I have in instrument plugged into channel 1 I will only hear sound if the inputs have 1-2, or 1. If it's a stereo track it will be on one side only.
And you have the pan adjustment.. pan left, pan right, pan center.
Use Logic online help for some quick hints

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Jkeeezy wrote:
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