Are you aware you can do an (easy) calibration for your own velocity settings using Pianoteq ?
Right under the velocity graph there's a "calibration" button.
Every one has there own feel and touch and one of the advantages (IMO) of MIDI keyboard is that you can set this to your own feel. That, in fairness, might not be desirable for people who also need to use real pianos, but even that can be matched by adjusting the curve to suit your needs.
You can "lock" in that velocity curve using the "preset freeze" window. Very handy.
I found it takes a few attempts to get a velocity curve that suits your needs. To my great surprise I ended up using the default after multiple attempts at my own. :-) YMMV as they say.
There are some downloadable settings that others have made ( see the forum ), but I'd suggest you calibrate yourself.
I suppose you might also need to adjust volume, but I'm presuming you tried that.
P.S. Nice keyboard. :-)
StephenG