Presonus Firestation Problems, signal distortion, preamp nonsense

Am a little out of my element right now. I am working on my first mac since 1989, and am still a newb when it comes to most things mac.
My basic problem is that when I attempt to record from my Presonus Firestation the line level never goes above 3 or 4 green bars. I've tried 3 guitars (1 acoustic with a preamp built-in), and an 1 AKG C3000B condenser mic.
When I use either the tube-drive or the gain adjustments on the Firestation, no noticeable difference in line level occurs until the signal distorts and becomes overdriven.
I've tried different inputs, different settings on the Firestation itself, and had no different results. From looking at the FAQ on HT, I have no idea why this recording setup shouldn't work.
A little more background... I used to use a Digi 001 with Pro Tools on a 2.8GHz Intel P4 PC and had no problems recording guitars using any inputs on the Digi. The front two inputs had mic/line selection and appears to be the only difference to me between the Digi and the Firestation.
Any advice or solutions would be greatly appreciated.
Thanks in advance.
iMac 20" 2.1GHz 512MB Mac OS X (10.4.4) Presonus Firestation

I suppose the best solution for a problem is a good night's sleep, a meal and a renewed head to tackle the problem.
The master control for volume was up a bit too high... the recording of the lines were not distorted... the speakers were.
Thanks to anyone that looked at this and scratched their heads. Chalk this one up to getting used to new equipment.
iMac 20" 2.1GHz 512MB Mac OS X (10.4.4)

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