Will Sansa Express work with Ford/Microsoft Sync

Will Sansa Express work with Ford/Microsoft Sync - when I connect the SE to the USB slot and then try and cycle through the Sync input options it won;t even go to the USB option so I’m presuming it doesn’t see the SE - is this a known problem?

Update on original question:   The SYNC System in the car now sees and plays music from the Sansa Express but will only play from the internal memory and doesn’t appear to be aware of any of the music on the 2gig expansion card.  Is there a certain way the expansioin card needs to be formatted to be seen by the SYNC software.