OK, two ideas:
1) Which build of piggy are you using? From that log, it looks like debian? There's a specific pi build here at the bottom with the ghettos (ALWAYS use the ghettos): http://littlegptracker.com/download.php
2) That being said, once you use the ghettos, different sound libs need to be installed.sudo apt-get install libasound2-plugins:i386
And maybe you'll have to remove the ":i386" again, maybe not! This is what got it working for me on debian but I've never tried on a pi...
no i'm using the lgpt.rpi-exe
I've already installed those libraries though... it only worked when i removed the :i386 otherwise it wasn't retrievable.