Cobra is correct, SD cards have a serial numbe in a sectorr that is not overwritten when the SD is cloned. The "Streets" software is tied to this serial number, and that's why it doesn't work on a cloned SD card. I usually carried a backup SD card for the 740 that worked fine, but the Streets software would not work on the backup card.
Copying everything ifrom a working SD card nto a folder on my PC desktop and then copying everything from that folder onto a new SD card worked for me, even copying to a different sized card.