Eagle tree logging MPH

[J57ltr]

I bought a V3 about a year ago and really like it. I also picked up the temp sensors, brushless RPM sensor and the hall effect sensor. I have been using the Brushless rpm sensor for a while with mixed results. Sometimes it reads Way over what the batteries and motor are even capable of.

I had set up the logger to calculate MPH but it never works. I decided to use the hall effect sensor and mounted the magnets in the diff of my Rustler to measure wheel RPM, but I am unable to get it to read MPH. I have checked all the settings, and I notice that even when I change certian things like turn airspeed off, it requires the computer to reboot. When I check it again the box is checked again.

I am not sure what I am doing wrong.

Thanks

Jeff