It's looking like the out from preamp is to high for the SD1 mic in...if you're familiar with soldering try to insert a resistor like 500k-1M betwen preamp out and SD1 in, it should work... or, that's even better, try to make a power supply for mic, you can find a lot pf schematics in the net, something like this
http://www.new-line.nl/?i=61 or buy one..around 100usd
Vio