hardware solution
my firepod has a knob on the front marked MIXER (one side inputs and one playback) turn it one way (playback), and you're hearing yer voice as it's sent thru the computer, comressed, reverbed, etc... then back out to you. This all takes your computer a moment, so you hear a mini delay, like a chorus.
If you turn the knob the other way (inputs), you hear your voice before it's sent to the computer and back, without "latency." Latency= the time it takes to go thru your computer and back.
I bet the firebox has this same knob.
Also, turn it to the "latency: side, if you will, to hear your tracks played back when you want to mix them down or check them.
Enjoy!
If this does not work, travisinflorida seems to be on top of the software side of things, so ask him