Since I have nothing better to do on a Thursday evening:
That file is just really quiet. Judging by the amount of noise I'm guessing you had very weak levels at the inputs from the get go. Top line in that picture is what I got off of myspace, second line was the 20 dB I was able to get by doing nothing other than turning the thing up. Third line is the 6 dB or so I was able to get on top of that by editing out two plosives that could have been avoided with better mic technique and/or a pop filter.
PM me if you'd like copies of this stuff.