FUZE 8gb won't play thru a usb cable, goes into charge mode

Is there a way to plug a USB cable into the FUZE and have it play thru it?  I have an FM transmitter in my car with a remote but it only works if plugged in with a USB cable. I use it now thru the headphone jack but would like to use the remote. I just upgraded firmware hoping it was a bug but still goes into charge as soon as the USB cable is plugged in. THanks