Boost converter extremely low efficiency
Take a look at the curves they published, What you are getting sounds somewhat close. I know you are losing voltage in the current measurement, that is the way they work.  The max with one volt in is 150mA at about 60% efficiency. I would assume you are below 1 volt which takes you completely off the curve. Consider putting two batteries in series, your efficiency will go up a lot and it might even work.