11 EDGE

Hi. Just got my 11 Edge and have come across one quirk so far. I was so excited that I could plug in my iPhone 3GS to access my iTunes library through the Edge BUT when I try to plug in my iPhone using the USB port an error comes up on the Nav screen saying SD Card Fault. I then have to take out the SD card, turn off the Edge, turn it back on, and then it will recognize the Nav card again (if I don't do it in that order, it won't recognize the card again). This problem has happened each time I tried to use the USB port. Any suggestions?? Otherwise I love my new Edge!