Below on this Digi International page, you will find links for downloading Digi Neo driver you need.
A Enterasys RoamAbout driver is an important program for your Digi International laptop or computer, as it promotes correct functioning of your MicroTouch M1700SS device. Moreover, a driver can promote correct functioning of any other device, e.g., a printer, a scanner or a display card. As a rule, your Hewlett-Packard unit is already furnished with a CD with the proper Digi Neo driver set. If the CD is lost, please take advantage of the Hewlett-Packard link for Digi Neo downloading.