Have you tried connecting the meter to the output of the phonostage or the preamp? A lot of cartridges don't have enough output for the meter to work straight off the cartridge.
Fozgometer
I've used this gizmo a few times before and think its a very valuable tool. I'm setting up a new cartridge, and nearing the end of a whole day job...anyway, I'm using the proper test record, yet, the meter doesn't work...I get a dull lights on the 2 red ones, although the middle power light works. Any suggestions?