Jukeman mp3 player

Question

i have a jwin jukem@n usb plug mp3 player, 1gb, jx-mp101. When
I plug it into my usb port, my computer doesn't sense that it is there. I plugged in a different device, a flash memory device and it worked. I looked
at the screen on the jwin mp3 player and there is an hourglass but the sand isn't moving. the memory on the jwin is about 1/2 full.