My computer does not recognize my M200series mp3 player when I connect with a cable to my USB port

MP3 players All other MP3 players
1

I have successfully connect my mp3 player to the computer via USB port many times but now the computer gives me the message to connect a device.  I am no longer able to sync music to my player.
Wonder

2

HI HI HI HI HI

Can you change the mode on the player to see if its the same on mtp and msc?

also check device manager and see if it shows, may show up with a ! or ?