Install Chery Keyboard Designer, “T:utilityCherry Keyboard Configuratorautostart.exe”

After Reboot, run Programs > Cherry Tools > Designer

Modify Active Configuration of a Keyboard

Magnetic Card > Track1 > enable “Header” > choose edit, then “Delete all”
hold “Shift” down, then press and release % key, then release the “Shift” key, press OK

Track1 > enable “Terminator” > choose edit, then “Delete all”
hold “Shift” down, then press and release ? key, then release the “Shift” key, then press and release the “Enter” key. press OK, now click on SAVE, then ACTIVATE.

Now test your Cherry Keyboard MSR, there should be a % sign before the Card number and a ? at the end of the Card number.