On the track you're using, lower it's volume down to, say, -5 to -9, and raise your computer's volume so you can hear as best you can during recording. I don't know too much about recording with an acoustic yet, I'm trying to figure some things out too. I've had trouble in the past recording acoustics. But with other instruments, real or software, I started lowering track volumes when recording to avoid clipping and distortion. Then, when you go to mix, you can tweak the volume of that track (and other tracks), bringing some up bringing others down, and adding compression and enhancements to help the guitar stand out, if that's what you want. I can't be sure this will work for you; you must take into account you're playing style/attack, where you're mike is placed, etc. I've heard that placing the mike angled down at the rear of the sound hole is the best point to record at.