mapfactor in win ce6 exit problem

hi
i am using free mapfactor app.
mapfactor in win ce6, exit button is not working properly, when click on exit

button,mapfactor program works, until click on map, after click

anywhere, mapfactor exit.  and after that, my car unit work very slowly, and

mapfactor doesn't run again until, unit, turn off and start again.
i installed mapfactor on sd card , usb flash memory and also internal unit storage but problem not solved.
i use 2 other navigation's software's, but those don't have any problem.