Wel theres the oviouse questions,
Do you have the drivers?
Do the drivers come for WinCE 5?
Does this fingerprint scanner have a manual ?
Was it purchased from esky ?
The more advanced questions,
Have you tried reading the manual ?
Have you tried to run the executable on the driver cd ?
Do you know how to interface it to the mini2440 ?
From what I found, specifically at
http://eu.miaxis.net/9/4/9/faq.htm?menu=4#44
They dont provide WINCE drivers.
But im sure you can write your own program - the datasheet explains all the commands quite well.