Nema 42 3100 oz/in motors will not move

I now have Nema 42 3100 oz/in motors in my Bridgeport retrofit. I
have tired everything I can figure out to get them to work with the
current software from CamSoft. I am being told that the Gecko
drives and the stepper motors are proper by the motor manufacturer
Anaheim Automation. This is because I can make the motors move the
x axis at 120 ipm using their step pulse generator. All these
comparisons are being done with the same Gecko drives, powersupply
etc. (However, the step pulse generator has a potentiometer that
gradually increases the step pulse rate rather that ramp it up by
accellerating the step pulse rate.)

The motion control board/software company, CamSoft, says it is not
their board or software that is the problem and that the motors are
underpowered. They feel the torque falls off and causes them to
stall at 20 ipm when using their stepper board and software. I know
the motors are capable of much higher rpms as described in the above
paragraph.

Can anyone explain this paradox? Got any ideas?

My next option is to send the motors back and get some in the 1000
oz/in range to see if they work better. Just trying to get some idea
if you guys agree.

thanks
Keith Clark