Cannot sync Sansa Fuze mp3 player with WMP 11 (Vista)?

I have the driver from the official website and I can access the player
through My Computer, but WMP 11 will still not recognize it. I have a lot of
songs in my hard drives and I don't want to drag+drop them all to the player,
so can someone help tell me how to sync it?

That sounds like either the device is formatted for USB Mass Storage instead
of MTP, or the MTP driver isn't working(?).