Parallel port power increase

Hi all, I have to start a new chain here on my project. I have my
M57-102 Compumotor and Driver connected to port 2 through 5 on my
parallel port on my laptop. I have a .dll file in my systems folder
and call it from a program I am building on VB6. The motor is
receiving a signal because it moves slighty as instructed, however
the port is not going high, only to about 1.5 volts. Is there a
schematic for using MOSFETs or iso-optical transistors, (I only have
a vague idea of what the heck I'm talking about), that will send
higher voltage from a higher powered source? I expect to use a 5 V DC
power source so shouldn't need the circuitry to control that.

Thanks in advance. And keep up the good work....there is a lot of
wisdom in these pages. Thanks, Randy