Music Tech-heads! To me!

This may be the wrong forum, but the other two seemed wrong. Feel free to move me if so.
ANYWAY! My problem.
I got a copy of Ableton Live 8, and a Novation Nio 2|4. I plugged my guitar into the Nio, put that into Ableton, set the drivers so that I'm using ASIO, (I downloaed ASIO4ALL) and...
Nothing. It is registering that I am getting signal in to the machine, but I am not getting any sound back out. I tried running a midi-signal through, to check if it was just an audio problem, but the midi isn't making any sound either (though still recieving signal)
As most of you know more about this than me, I humbly come to and grovel for halp pl0x.
ANYWAY! My problem.
I got a copy of Ableton Live 8, and a Novation Nio 2|4. I plugged my guitar into the Nio, put that into Ableton, set the drivers so that I'm using ASIO, (I downloaed ASIO4ALL) and...
Nothing. It is registering that I am getting signal in to the machine, but I am not getting any sound back out. I tried running a midi-signal through, to check if it was just an audio problem, but the midi isn't making any sound either (though still recieving signal)
As most of you know more about this than me, I humbly come to and grovel for halp pl0x.