HFS only changes port numbers if the port it attempts to run on (80 by default) is already in use.
1. Switch HFS to OFF (click on ON) in the upper left corner.
2. Enter the port you like in the port box
3. Switch back ON
HFS now always uses the selected port if it's not in use.
BTW, this is the test forum, you should post in the HFS forum to get more attention.

MarkV