i find it is conflicting with CNNT 2014.20 in the builtin memory, even i de-select it from installed map. the only way to do it rename the builtin map .img file. then i will be able to see the cityxplorer map listed. means, i have to have 2014.10 CNNT map to go with cityxplorer regardless full version or mms only version. will try if i can move the map to SD. so that when switch from public transit to drive, i do not have to modify the files with PC. maybe just switch the SD card.