Midi, No MIDI in? Options

[lunar 1]

I am trying to record my Sax into Cubase SE. The route is this:
From a Macki mixer, to an OMNI i/o, thrugh a Quattro Midi interface, Midied into a Roland SS88 keyboard Workstation, and on into Cubase in my Mac, useing OSX, Via USB from the Quattro. I can play Midi files thrugh this system out to the mains, But playing the keyboard or the Sax back into the Compuiter isn't working. I have checked all my settings over and over again. Midi thrugh, Local off, Midi soft thrugh, ETC. I have two Midi cables IE. IN and OUT. It seams that I have no Midi signal going back into the compuiter from the Quattro. The OMNI i/o is what I'm using for the Sax.
Is this problem between the Quattro and the Compuiter? Or what? Your help would be great.

[kaboombahchuck]

Um,,, I am not shure you know what midi is, in fact I know you have not clue whatsoever...
I don't meen to be mean, but that's how it goes.
MIDI is not audio. In fact is has nothing to do with audio (exept the end result).
You sax is not a midi instrument. Trust me on this as I am a sax player also.
I am not going to pretend to know what all of the interfaces you mentioned are, because as I see it they are no use to you or me with you lack of know it all. If you want to record the sax, run a line from your mackie (some sort of audio out, like mains out or headphome out) to the line in of your mac. Choose an audio track in Cubase ( I have never had luck with Cubase) and record the adio track of your sax....... (I am assuming that you have the sax some how miced to the Mackie).