Hello,
This is because Droid X2 have an internal USB storage and in this case
your AndiCar files are located on that device and not on the external
sdcard.
You can verify by opening the Storage screen form the phone settings
(Settings -> Storage). If this is your case you will see three storage
zones: Device memory, USB storage and SD card.
The solution for your problem is to move the whole andicar folder from
the SD card to the USB storage using an Android file explorer (My
files or AndExplorer) or a PC. If you use an Android file explorer the
SD card is located on /sdcard/external_sd.