We have heard of a small number of users having problems with these pedals but have so far been unsuccessful in re-creating the problem here to find what is really happening.
A Pedal Power does not have a "ramp-up' to speak of... The only limit to achieving full voltage would be a large current load at startup. My suspicion would be that the pedals have a rather large startup current spike that is well outside the 100mA current spec. You could try using a
Current Doubler Adapter (the one with the Green end) which we have heard seems to work.
What are the other pedals you are running from your Pedal Power?
Also, want to send me your "9" pedal and the power supply that came with it as well as your Pedal Power?